Nelson, Thurlow C, and James B. Allison. 



1940. On the nature and action of diantlin; a new 

 hormone-like substance carried by the spermatozoa 

 of the oyster. Journal of Experimental Zoology, 

 vol. 85, No. 2, pp. 299-338. 



Okada, Katsuhiro. 



1936. Some notes on Sphacrium japonicurii biwaense 

 Mori, a freshwater bivalve. IV. Gastrula and 

 fetal larva. Science Reports of the Tohoku 

 Imperial University, series 4, Biology, vol. 11, 

 No. 1, pp. 49-68. 



1939. The development of the primary mesoderm 

 in Sphacrium japonicum bitvaense Mori. Science 

 Reports of the Tohoku Imperial University, series 

 4, Biology, vol. 14, No. 1, pp. 25-48. 

 Orton, J. H. 



1920. Sea-temperature, breeding and distribution 

 in marine animals. Journal of the Marine Biologi- 

 cal Association of the United Kingdom, vol. 12, 

 No. 2, pp. 339-366. 



1926. On lunar periodicity in spawning of normally 

 grown Falmouth oysters (0. cdulis) in 1925, with a 

 comparison of the spawning capacity of normally 

 grown and dumpy oysters. Journal of the Marine 

 Biological Association of the United Kingdom, vol. 

 14, No. 1, pp. 199-225. 



1927. Observations and experiments on sex-change 

 in the European oyster (0. edulis). Part I. 

 The change from female to male. Journal of the 

 Marine Biological Association of the United King- 

 dom, vol. 14, No. 4, pp. 967-1045. 



1933. Observations and experiments on sex-change 

 in the European oyster (0. edulis). Part III. 

 On the fate of unspawned ova. Part IV. On the 

 change from male to female. Journal of the Marine 

 Biological Association of the United Kingdom, 

 vol. 19, No. 1, pp. 1-53. 

 Perry, John H. (editor). 



1941. Chemical engineers' handbook. 2d ed. 

 McGraw-Hill Book Co., Inc., New York, 3029 pp. 



Prytherch, Herbert F. 



1929. Investigation of the physical conditions 

 controlling spawning of oysters and the occurrence, 

 distribution, and setting of oyster larvae in Milford 

 Harbor, Connecticut. Bulletin of the U.S. Bureau 

 of Fisheries, vol. 44, for 1928, pp. 429-503. (Docu- 

 ment 1054.) 



ROUGHLEY, T. C. 



1933. The life history of the Australian oyster 

 {Ostrea commercialis) . Proceedings of the Linnean 

 Society of New South Wales, vol. 58, pp. 279-333. 



Sparck, R. 



1925. Studies on the biology of the oyster (Ostrea 

 edulis) in the Limfjord, with special reference to 

 the influence of temperature on the sex change. 

 Report of the Danish Biological Station to the 

 Board of Agriculture, 30, 1924. 84 pp. 



Stafford, Joseph. 



1913. The Canadian oyster, its development, 

 environment and culture. Committee on Fisheries, 

 Game and Fur-bearing Animals, Commission of 

 Conservation, Canada. The Mortimer Company, 

 Ltd., Ottawa, Canada, 159 pp. 



Stauber, Leslie A. 



1950. The problem of physiological species with 

 special reference to oysters and oyster drills. 

 Ecology, vol. 31, No. 1, pp. 109-118. 



Woods, Farris H. 



1931. History of the germ cells in Sphaerium striati- 

 num (Lam.). Journal of Morphology, vol. 51, 

 No. 2, pp. 545-595. 



1932. Keimbahn determinants and continuity of the 

 germ cells in Sphaerium slrialinum (Lam.). Journal 

 of Morphology, vol. 53, No. 2, pp. 345-365. 



Yonge, C. M. 



1960. Oysters. Collins Clear-type Press, Ijondon, 

 209 pp. 



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