Sexual dimorphism in spotted dolphins (Stenella attenuata) in the eastern tropical
Pacific Ocean.
GARY D. SCHNELL, MICHAEL E. DOUGLAS AND DANIEL J. HOUGH  ..........................1

Status of studies on fossil marine mammals.
LAWRENCE G. BARNES, DARYL P. DOMNING AND CLAYTON E. RAY .....................15

Population ecology of seals: retrospective and prospective views.
IAN A. McLAREN AND THOMAS G . SMITH .....................................................................54

NOTES

Mating behavior in the harbor seal.
SARAH G. ALLEN ..................................................................................................................84

OPINION

Writing for the reader.
JOSEPH R. GERACI ................................................................................................................88

LETTERS .................................................................................................................................89

BOOKS ....................................................................................................................................90

General Features of the Paleobiological Evolution of Cetacea. Guram Andreevich
Mchedlidze. English Translation from Russian for the Smithsonian Institute Libraries
and the National Science Foundation, Amerind Publishing Co. Pvt. Ltd. New Delhi,1984.
Reviewed by Lawrence G. Barnes.

How to Write and Publish a Scientific Paper. R. A. Day. 2nd Ed. ISI Press. Philadelphia.
Reviewed by Katherine Ralls.

NEWS ......................................................................................................................................95

MEMORIES

Raymond M. Gilmore ................................................................................................................96

Masaharu Nishiwaki ..................................................................................................................97

BUSINESS

Constitution and Bylaws .............................................................................................................99

THANK YOU ........................................................................................................................104

GUIDE FOR AUTHORS ........................................................................................................105

Conservation and protection of marine mammals: past, present and future.
ROBERT J. HOFMAN AND W. NIGEL BONNER ..............................................................109

Beyond bean counting and whale tales.
BURNEY J. LE BOEUF AND BERND WURSIG .................................................................128

Evolution, taxonomy and antitropical distributions of the porpoises (Phocoenidae, Mammalia).
LAWRENCE G. BARNES .....................................................................................................149

Physiology without restraint in diving mammals.
GERALD L. KOOYMAN ......................................................................................................166

BOOKS

Reviews ...................................................................................................................................179

Communication and Behavior of Whales. R. Payne (ed.) American Association
for the Advancement of Science Westview Press, Boulder, Colorado.
Reviewed by Thomas J. O'Shea.

Strandings: Ways to Save Whales. F. D. Robson. The Science Press Ltd.
Johannesburg, South Africa.
Reviewed by John E. Heyning

New Books .............................................................................................................................183

NEWS

Bill Marquette Retires ..............................................................................................................185

MEMORIES

Mark C. Keyes .......................................................................................................................186

James H. Johnson ....................................................................................................................187

GUIDE FOR AUTHORS ........................................................................................................188

Radiotagging studies of belukha whales (Delphinapterus leucas) in Bristol Bay, Alaska.
KATHRYN J. FROST, LLOYD F. LOWRY AND ROBERT R. NELSON ..........................191

Force and bending moment of the caudal muscles in the shortfin pilot whale.
ROBERT ARKOWITZ AND SENTIEL ROMMEL ...............................................................203

The breeding cycle of the southern sea lion, Otaria byronia.
CLAUDIO CAMPAGNA ......................................................................................................210

Sensory biophysics of marine mammals.
WILLIAM A. WATKINS AND DOUGLAS WARTZOK .....................................................219

OPINION

Sea otters or shellfish: a choice.
VICTOR B. SCHEFFER ........................................................................................................261

LETTERS ...............................................................................................................................263

BOOKS ..................................................................................................................................264

Echolocation in Whales and Dolphins. P. E. Purves and G. E. Pilleri.
Academic Press, New York, N.Y.
Reviewed by Samuel A. McLeod.

Pathobiology of Marine Mammal Diseases. E. B. Howard (ed.).
CRC Press, Inc. Boca Raton, FL.
Reviewed by Daniel F. Cowan.

BUSINESS .............................................................................................................................268

GUIDE FOR AUTHORS ........................................................................................................270

Reproductive maturity and seasonality of male spotted dolphins, Stenella attenuata,
in the eastern tropical Pacific.
ALETA A. HOHN, SUSAN J. CHIVERS AND JAY BARLOW ...........................................273

Development of a bimodal heart rate pattern in undisturbed fetal harbor seals.
JAMIE P. BACON, R. STUART MACKAY, HERBERT E. COHN
AND AUSTIN F. S. LEE .......................................................................................................294

Population characteristics and migration of summer and late-season humpback whales
(Megaptera novaeangliae) in southeastern Alaska.
C. SCOTT BAKER, LOUIS M. HERMAN, ANJANETTE PERRY,
WILLIAM S. LAWTON, JANICE M. STRALEY AND JOHN H. STRALEY .....................304

Axial musculature in the dolphin (Tursiops truncatus): Some architectural and
histochemical characteristics.
M. A. BELLO, R. R. ROY, T. P. MARTIN,H. W. GOFORTH, JR.
AND V. R. EDGERTON ........................................................................................................324

NOTES

Haulout behavior of California sea otters, Enhydra lutris.
ELLEN R . FAUROT .............................................................................................................337

LETTERS ...............................................................................................................................340

BOOKS

Reviews ..................................................................................................................................342

Antarctic Ecology. R. M. Laws (ed.) Academic Press. London and New York.
Reviewed by Donald B. Siniff and Robert L. Brownell, Jr. Seals of the World. J. E. King.
Cornell University Press (in co-op with British Museum of Natural History).
Reviewed by Robert H. Mattlin.

Reproduction in Whales, Dolphins and Porpoises. W. F. Perrin, R. L. Brownell, Jr.,
and D. P. DeMaster, eds. Reports of the International Whaling Commission.
Cambridge England.
Reviewed by Richard M. Laws.

New Books ...........................................................................................................................347

GUIDE FOR AUTHORS ......................................................................................................348