The ocular fundus of two cetaceans.
WILLIAM W. DAWSON, J. PETE SCHROEDER AND J. FRENCH DAWSON ...................1

Growth layer groups (GLGs) in the teeth of an adult belukha whale (Delphinapterus leucas)
of known age: Evidence for two annual layers.
ARTHUR D. GOREN, PAUL F. BRODIE, STEPHEN SPOTTE,
G. CARLETON RAY, H. W. KAUFMAN, A. JOHN GWINNETT,
JAMES J. SCIUBBA AND JOHN D. BUCK ..........................................................................14

External morphology and pigmentation of the vaquita, Phocoena sinus (Cetacea: Mammalia).
ROBERT L. BROWNELL, JR., LLOYD T. FINDLEY, OMAR VIDAL,
ALEJANDRO ROBLES AND SILVIA MANZANILLA N. ....................................................22

Audiometric assessment of northern fur seals, Callorhinus ursinus.
PATRICK W. B. MOORE AND RONALD J. SCHUSTERMAN ...........................................31

Relative abundance, distribution and inter-specific relationship of cetacean schools
in the eastern tropical Pacific.
TOM POLACHECK ................................................................................................................54

NOTES

Steno bredanensis in the Mediterranean Sea.
WILLIAM A. WATKINS, PETER TYACK, KAREN E. MOORE
AND GIUSEPPE NOTARBARTOLO-DI-SCIARA ................................................................78

The placenta of the killer whale, Orcinus orca.
K. BENIRSCHKE AND LANNY H. CORNELL ....................................................................82

LETTERS

The scientific name of the sperm whale.
L. B. HOLTHUIS .....................................................................................................................87
WILLIAM E. SCHEVILL ........................................................................................................89

BOOKS

Reviews ....................................................................................................................................91

Whales and Dolphins of New Zealand and Australia. An Identification Guide.
A. N. Baker. Victoria University Press, Wellington, New Zealand.
Guia Para el Reconocimiento de Cetaceos del Mar Argentino. A. Lichter and
A. Hooper. Fundaci¢n Vida Silvestre Argentina, Buenos Aires, Argentina.
Mamiferos Marinos de Chile. W. Sielfeld K. Universidad de Chile, Santiago.
Reviewed by Robert L. Brownell, Jr.

The Whale Watcher's Handbook. Erich Hoyt. Illustrations by Pieter Folkens.
Penguin Books Canada Ltd., Markham, Ontario; Doubleday & Co., New York.
Reviewed by Randall S. Wells.

The Sierra Club Handbook of Whales and Dolphins. S. Leatherwood and
R. R. Reeves (paintings by L. Foster). Sierra Club Books, San Francisco, CA.
Reviewed by Randall S. Wells.

New Books ...............................................................................................................................94

GUIDE FOR AUTHORS ..........................................................................................................95

Revision of the spotted dolphins, Stenella ssp..
W. F. PERRIN, E. D. MITCHELL, J. G. MEAD, D. K. CALDWELL,
M. C. CALDWELL, P. J. H. VAN BREE AND W. H. DAWBIN ............................................99

Correct and incorrect use of recruitment rates for marine mammals.
MITCHELL TAYLOR, J. SCOTT CARLEY AND FRED L. BUNNELL ..............................171

Size-class segregation of bowhead whales discerned through aerial
stereophotogrammetry.
JAMES C. CUBBAGE AND JOHN CALAMBOKIDIS .......................................................179

Corneal surface properties of two marine mammal species.
WILLIAM W. DAWSON, J. PETE SCHROEDER AND
SCOTT N. SHARPE ..............................................................................................................186

BOOKS

Reviews ...................................................................................................................................198

International Regulation of Whaling: From Conservation of Whaling to
Conservation of Whales and Regulaion of Whale Watching. Patricia Birnie.
Oceana Publications, Inc., New York.
Reviewed by Douglas G. Chapman.

Behaviour of Whales in Relation to Management. G. P. Donovan (ed.).
International Whaling Commission, Combridge, U.K.
Reviewed by J. F. Eisenberg.

A Handbook for the Identification of Cephalopod Beaks.
Malcolm R. Clarke (ed.). Oxford University Press, New York.
Reviewed by Richard E. Young.

The War Against the Seals: A History of the North American
Seal Fishery. Briton Cooper Busch. McGill Queen's University Press,
Kingston and Montreal, Canada.
Reviewed by W. N. Bonner.

The Harbor Seal. Doug Bertran Productions, Olympia Washington.
Reviewed by Sarah G. Allen.

New Books .............................................................................................................................203

BUSINESS .............................................................................................................................205

NEWS ....................................................................................................................................206

The physiological transition from fasting to feeding in weaned elephant seal pups.
RICHARD S. CONDIT AND C. LEO ORTIZ .......................................................................207

Thermoregulatory adaptations in marine mammals: Interacting effects of exercise
and body mass. A review.
G . C . WHITTOW .................................................................................................................220

Using organochlorine pollutants to discriminate marine mammal populations:
A review and critique of the methods.
ALEX AGUILAR ...................................................................................................................242

Atypical pup rearing strategies by sea otters.
DAVID L. GARSHELIS AND JUDITH A. GARSHELIS ......................................................263

NOTES

An implanted transponder chip used as a tag for sea otters (Enhydra lutris).
J. A. THOMAS, L. H. CORNELL, B. E. JOSEPH, T. D. WILLIAMS
AND S. DREISCHMAN .......................................................................................................271

Some observations on the prey stunning hypothesis.
MARIC ZAGAESKI ..............................................................................................................275

The attainment of sexual maturity in two female humpback whales.
PHILLIP J. CLAPHAM AND CHARLES A. MAYO ...........................................................279

Whale heads and ray diagrams.
R. STUART MACKAY ..........................................................................................................283

LETTERS

Communicating with people about communicating with dolphins.
LOUIS M. HERMAN .............................................................................................................286
FRANK T. AWBREY ............................................................................................................287

Annual reports of the IWC.
G. P. DONOVAN ..................................................................................................................288

BOOKS

Reviews ...................................................................................................................................289

Whales, Ice, and Men. The History of Whaling in the Western Arctic.
John R. Bockstoce. University of Washington Press, Seattle and London,
in association with the New Bedford Whaling Museum, Massachusetts.
Reviewed by Jeffrey M. Breiwick and William M. Marquette.

Building Models for Conservation and Wildlife Management.
A. M. Starfield and A. L. Bleloch. Macmillan Publishing Company,
New York.
Mammals in Hawaii I. A Synopsis and Notational Bibliography.
P. Quentin Tomich. Bishop Museum Press, Special Publication 76,
Honolulu, Hawaii.
Hawaii's Humpback Whales. A Complete Whalewatchers Guide.
B. D. Kaufman and P. H. Forestell. Pacific Whale Foundation Press,
Maui, Hawaii.
All three above reviewed by Howard E. Winn.

New Books .............................................................................................................................291

MEMORIES

ROBIN CHRISTOPHER BEST .............................................................................................292

THANK YOU

JOSEPH R. GERACI .............................................................................................................294

DOUGLAS WARTZOK ........................................................................................................295

Statistical methods for estimating numbers of Cape fur seal pups from aerial surveys.
N. A. C. CRESSIE AND P. D. SHAUGHNESSY .................................................................297

Assessing northern elephant seal feeding habits by stomach lavage.
GEORGE A. ANTONELIS, JR., MARK S. LOWRY,
DOUGLAS P. DEMASTER AND CLIFFORD H. FISCUS ..................................................308

Diel haul-out patterns and site fidelity of harbor seals (Phoca vitulina richardsi)
on San Miguel Island, California, in autumn.
PAMELA K. YOCHEM, BRENT S. STEWART, ROBERT L. DELONG
AND DOUGLAS P. DEMASTER ..........................................................................................323

Spatial and seasonal distribution of the humpback whale, Megaptera novaeangliae,
in the Mexican Pacific.
JORGE URBAN R. AND ANELIO AGUAYO L...................................................................333

Observations of an unidentified beaked whale (Mesoplodon sp.) in the eastern tropical Pacific.
ROBERT L. PITMAN, ANELIO AGUAYO L. AND JORGE URBAN R. ............................345

NOTES

Behavioral observations of the dwarf sperm whale, Kogia simus.
MICHAEL D. SCOTT AND JOSEPH G. CORDARO ..........................................................353

Recent records of pygmy sperm whales in the Gulf of California, Mexico.
OMAR VIDAL, LLOYD T. FINDLEY, PEGGY J. TURK
AND RICHARD E. BOYER ..................................................................................................354

Killer whale, Orcinus orca, in the Mediterranean Sea.
GIUSEPPE NOTARBARTOLO-DI-SCIARA .......................................................................356

BOOKS

Reviews ...................................................................................................................................361

Behavioral Biology of Killer Whales. Barbara C. Kirkevold and
Joan S. Lockark, eds., Zoo Biology Monographs, Volume 1,
Terry L. Maple, series editor, Alan R. Liss, Inc., New York.
Reviewed by Peter Tyack.

Arctic Whalers, Icy Seas. Narratives of the Davis Strait Whale Fishery.
W. Gillies Ross. Irwin Publishing, Toronto.
Reviewed by K. J. Finley.

New Books .............................................................................................................................366

BUSINESS

Statement of cash activity--1985 ..............................................................................................367

Statement of cash activity--1986 ..............................................................................................368

Minutes of general meeting--1985 ............................................................................................369

INDEX TO VOLUME 3 ........................................................................................................371