486 DISCOVERY REPORTS 



Pike, G. C, 1953. Preliminary report on the growth of finback whales from the coast of British Columbia. Norsk Hvalfangsttid. 



42Arg. (1), pp. 11-15. 

 Purves, P. E., 1955. The wax plug in the external auditory meatus of the Mysticeti. Discovery Rep. vol. xxvn, pp. 293-302. 



1958- The use of the ear plug in age determination in whales. Proc. XV th Internat. Congr. Zool., sect, in, pp. 305-7. 



Purves, P. E. and Mountford, M. D., 1959. Ear plug laminations in relation to the age composition of a population of fin whales 



(Balaenoptera physalus). Bull. Brit. Mus. (Nat. Hist.), Zool. vol. v (6), pp. 123-62. 

 Rayner, G. W., 1940. Whale marking. Progress and results to December ig3g. Discovery Rep. vol. XIX, pp. 245-84. 

 Reynolds, S. R. M., 1950. The vasculature of the ovary and ovarian function. Recent progress in hormone research, vol. V, 



pp. 65-100. Academic Press, N.Y. 

 Robinette, W. L., Gashweiler, J. S., Jones, D. A. and Crane, H. S., 1955. Fertility of mule deer in Utah. J. Wildlife Mgmt. 



vol. xix (1), pp. 115-36. 

 Robins, J. P., 1954. Ovulation and pregnancy corpora lutea in the ovaries of the humpback whale. Nature, Lond. vol. clxxiii, 



pp. 201-3. 

 Robinson, A., 1918. The formation, rupture and closure of ovarian follicles in ferrets and ferret-polecat hybrids, and some associated 



phenomena. Trans. Roy. Soc. Edinb. vol. lii, p. 303. 

 Rossman, J., 1942. On the lipin and pigment in the corpus luteum of the rhesus monkey. Contr. Embryol. Carneg. Instn, vol. xxx, 



pp. 97-110. 

 Ruud, J. T., 1940. The surface structure of the baleen plates as a possible clue to age in whales. Hvalrad. Skr. nr. 23, pp. 1-24. 



1945. Further studies on the structure of the baleen plates and their application to age determination. Hvalrad. Skr. 



nr. 29, pp. 1-69. 



1958. The use of baleen plates in age determination of whales. Proc. XVth Internat. Congr. Zool., sect, in, pp. 302-33. 



Ruud, J. T., Jonsgard, A. and Ottestad, P., 1950. Age studies on blue whales. Hvalrad. Skr. nr. 33, pp. 1-72. 

 Severinghaus, C. W., 1951. A study of productivity and mortality of corralled deer. J. Wildlife Mgmt. vol. xv, pp. 73-80. 

 Slijper, E. J., 1949. On some phenomena concerning pregnancy and parturition of the cetacea. Bijd. Dierk. vol. xxvm, p. 416. 



1956. Some remarks on gestation and birth in cetacea and other aquatic mammals. Hvalrad. Skr. nr. 41, pp. 1-62. 



Swezy, O., 1933. Ovogenesis and its relation to the hypophysis; the effect of pregnancy, hypophysectomy and hormone administra- 

 tion on the ovary of the rat. Science Press, Lancaster, Philadelphia, p. 72. 



Swezy, O. and Evans, H. M., 1930. Ovarian changes in the rat. Science, vol. lxxi, p. 46. 



Symons, H. W. and Weston, R. D., 1958. Studies on the humpback whale (Megaptera nodosa) in the Bellingshausen Sea. 



Norsk Hvalfangsttid. 47 Arg. (2), pp. 53-81. 

 Thompson, D'A. W., 1952. On growth and form. Cambridge University Press. 

 Tomilin, A. G., 1945. [The age of whales as determined from their baleen apparatus.] C.R. Acad. Sci. Dokl. Acad. Nauk, SSSR, 



vol. xlix (6), pp. 460-3. 

 Wheeler, J. F. G., 1930. The age of fin whales at physical maturity with a note on multiple ovulations. Discovery Rep. vol. II, 



PP- 4°3"34- 



I934- On the stock of zvhales at South Georgia. Discovery Rep. vol. IX, pp. 351-72. 



Williams, S. M., Carrigus, U. S., Norton, H. W. and Nalbandov, A. V., 1956. The occurrence of estrus in pregnant ewes. 



J. Anim. Sci. vol. xv (4), pp. 978-83. 

 Wynne-Edwards, V. C, 1939. Intermittent breeding in the fulmar Fulmarus glacialis (L.), with some general observations on 



non-breeding sea-birds. Proc. Zool. Soc. Lond. vol. cxix, p. 127. 

 Zemskiy, V. A., 1950a. [Some aspects of the biology of reproduction of certain species of antarctic whalebone whales.] Bull. Soc. 



Nat. Moscou, N.S. Biol. Sect. vol. lv (2), pp. 1-10. 

 19506. [Material for the study of the embryonic development of Balaenoptera physalus L.] Bull. Soc. Nat. Moscou, 



N.S. Biol. Sect. vol. lv (6), pp. 15-20. 



* These papers also appear in Collected Reprints of the National Institute of Oceanography. 



