ECOLOGY AND BIOLOGY OF THE PACIFIC WALRUS 



277 



of the Okhotsk Sea. Trudy Inst. Okeanol. (Moscow) 46:3-84. 



Scammon, C. M. 1874. The marine mammals of the north-western coast of North Amer- 

 ica, described and illustrated, together with an account of the American whale-fishery. 

 J. H. Carmany and Co., San Francisco. 312 pp. 



Scapino, R. P. 1965. The third joint of the canine jaw. J. Morphol. 116:23-50. 



Scheffer, V. B. 1949. The clitoris bone in two pinnipeds. J. Mammal. 30:269-270. 



Scheffer, V. B. 1950. Growth layers on the teeth of Pinnipedia as an indication of age. 

 Science 112:309-311. 



Scheffer, V. B. 1958. Seals, sea lions, and walruses, a review of the Pinnipedia. Stanford 



University Press, Stanford, Calif. 179 pp. 

 Scheffer, V. B. 1962. Pelage and surface topography of the northern fur seal. U.S. Fish 



Wildl. Serv., N. Am. Fauna 64. 206 pp. 

 Scheffer, V. B. 1964. Hair patterns in seals (Pinnipedia). J. Morphol. 115:291-303. 

 Scheffer, V. B. 1967a. Dentition of newborn Steller sea lion, Eumetopias jubatus 



(Schreber, 1776). Saugetierk. Mitteil. 15(2): 126-128. 

 Scheffer, V. B., editor. 1967^?. Standard measurements of seals. J. Mammal. 48:459-462. 

 Scheffer, V. B., and K. W. Kenvon. 1963. Baculum size in pinnipeds. Z. Saugetierk. 



28:38-41. 



Scheffer, V. B., and B. S. Kraus. 1964. Dentition of the northern fur seal. Fish. Bull. 

 63:293-342. 



Scheffer, V. B., and J. W. Slipp. 1948. The whales and dolphins of Washington State 

 with a key to the cetaceans of the west coast of North America. Am. Midi. Nat. 

 39:257-337. 



Scheffer, V. B., and F. Wilke. 1953. Relative growth in the northern fur seal. Growth 

 17:129-145. 



Schiller, E. L. 1954. Unusual walrus mortality on St. Lawrence Island, Alaska. 



J. Mammal. 35:203-210. 

 Schour, I. 1953. Noyes' oral histology and embryology. Lea and Febiger, Philadelphia. 



448 pp. 



Schule, J. J., Jr., and W. I. Wittmann. 1958. Comparative ice conditions in North Amer- 

 ican Arctic, 1953 to 1955, inclusive. Trans. Am. Geophys. Union 39:409-419. 



Schusterman, R. J., and R. L. Gentry. 1971. Development of a fatted male phenom- 

 enon in California sea lions. Devel. Psychobiol. 4:333-338. 



Scott, J. H., and N. B. B. Symons. 1961. Introduction to dental anatomy. E. and S. Liv- 

 ingstone Ltd., Edinburgh. 388 pp. 



Shapiro, L. H., and J. J. Burns. 1975(3. SateUite observations of sea ice movement in 

 the Bering Strait region. Pages 379-386 in G. Weller and S. A. Bowling, eds. Climate of 

 the Arctic. Geophysical Institute, University of Alaska, Fairbanks. 



Shapiro, L. H., and J. J. Burns. 1975fc. Major late- winter features of ice in northern 

 Bering and Chukchi seas as determined from satellite imagery. Geophys. Inst., Univ. 

 Alaska, Sea Grant Rep. 75-8. 16 pp. 



Shustov, A. P. 1969. Relative indices and possible causes of mortality of Bering Sea 

 ribbon seals. Pages 83-92 in V. A. Arsen'ev, B. A. Zenkovich, and K. K. Chapskii, eds. 

 Morskie mlekopitaiuschie. Nauka, Moscow. 



Siniff, D. B., I. Stirling, and L. L. Eberhardt. 1978. Problems in the conservation of polar 

 marine mammals. Pages 161-174 in M. A. McWhinnie, ed. Polar research: to the 

 present, and the future. Symposium 7, American Association Advancement Science, 

 Washington, D.C. 



Siple, P. A., and C. F. Passel. 1945. Measurements of dry atmospheric cooling in sub- 

 freezing temperatures. Proc. Am. Philos. Soc. 89:177-199. 



Sivertsen, E. 1941. On the biology of the harp seal, Phoca groenlandica Erxl.: investiga- 

 tions carried out in the White Sea, 1925-1937. Norske Videnskaps-Akademii, Oslo, 

 Hvalradets Skr. 26. 166 pp. 



Sleptsov, M. M. 1943. The biology of reproduction of Pinnipedia of the Far East. Zool. 

 Zh. (Moscow) 22:109-128. 



Smith, J. M., and R. J. G. Savage. 1959. The mechanics of mammalian jaws. School Sci. 

 Rev. 141:289-301. 



Sokolov, V. E. 1960. Structure of the cutaneous integument of the Pinnipedia, pt. 2. 

 Biul. Mosk. Obsch. Isp. Prirody, otd. biol. 65:5-17. 



