4 8 4 DISCOVERY REPORTS 



Horst, C. J. VAN DER and Gillman, J., 1 946. The corpus luteum of Elephantulus during pregnancy— its form and function. 



S. Afr. J. Med. Sci. vol. xi, Biol. Suppl. p. 87. 

 Huggett, A. St G. and Widdas, W. F., 1951. The relationship between mammalian foetal weight and conception age. J. Physiol. 



vol. cxiv (3), pp. 306-17. 

 Hylen, A., Jonsgard, A., Pike, G. C. and Ruud, J. T., 1955. A preliminary report on the age composition of antarctic fin whale 



catches 1945J46 to 1952/53 and some reflections on total mortality rates of fin whales. Norsk Hvalfangsttid. 44 Arg. (10), 



PP- 577~ 8 9- 



Jonsgard, A., 195 1. Studies on the little piked whale or minke whale (Balaenoptera acuto-rostrata Lacepede). Norsk Hval- 

 fangsttid. 40 Arg. (5), pp. 5-54. 



I95 2. On the growth of the fin whale (Balaenoptera physalus) in different waters. Norsk Hvalfangsttid. 41 Arg. (2), 



PP- 57- 6 5- 

 Kakuwa, Z., Kawakami, T. and Iguchi, K., 1953. Biological investigation on the whales caught by the Japanese antarctic 



whaling fleets in the 1951-52 season. Sci. Rep. Whales Res. Inst., Tokyo, no. 8, pp. 147-213. 

 Kellogg, R., 1929. What is known of the migrations of some of the whalebone whales. Smithson. Rep. for 1928, pp. 467-94. 

 Kenyon, K. W. and Wilke, F., 1953. Migration of the northern fur seal (Callorhinus ursinus). J. Mammal, vol. xxxiv (1), 



pp. 86-98. 

 Kimura, S., 1957. The twinning in southern fin whales. Sci. Rep. Whales Res. Inst., Tokyo, no. 12, pp. 103-25. 

 Lack, D., 1954. The natural regulation of animal numbers. Oxford, viii + 343 pp. 

 Laurie, A. H., 1937. The age of female blue whales and the effect of whaling on the stock. Discovery Rep. vol. xv, 



pp. 223-84. 

 Laws, R. M., 1954*. Giant ovaries of a blue whale. Nature, Lond. vol. clxxiii, p. 1003. 



1956a. Breeding and mortality rates of antarctic fin whales. The Challenger Soc, Abstr. of Papers, vol. Ill, no. 8, p. 31. 



19566*. Growth and sexual maturity in aquatic mammals. Nature, Lond. vol. CLXXVlii, pp. 193-4. 



1956c. The elephant seal (Mirounga leonina Linn.). III. The physiology of reproduction. Falkland Islands Dependencies 



Surv. Sci. Rep. no. 15, pp. 1-66. 



1957*- Polarity of whale ovaries. Nature, Lond. vol. clxxix, pp. 1011-12. 



1958a*. Recent investigations on fin whale ovaries. Norsk Hvalfangsttid. 47 Arg. (5), pp. 225-54. 



19586. Age determination of whales by means of the corpora albicantia. Proc. XVth Int. Congr. Zool., Sect, ill, pp. 303-5. 



1959a. The foetal growth rates of whales with special reference to the fin whale, Balaenoptera physalus Linn. Discovery 



Rep. vol. xxix, pp. 281-308. 

 19596*. On the breeding season of southern hemisphere fin whales Balaenoptera physalus {Linn.). Norsk Hvalfangsttid. 



48 Arg. (7), pp. 329-51. 



1959 c*. Accelerated growth in seals with special reference to the Phoadae. Norsk Hvalfangsttid. 48 Arg. (9), pp. 425-52. 



i960. Problems of whale conservation. Trans. N. Amer. Wildlife Conf. 25, pp. 304-19. 



(in press) Some effects of whaling on the southern stocks of baleen whales. Brit. Ecol. Soc, Symposium on the Exploita- 

 tion of Natural Animal Populations, i960. 



Laws, R. M. and Purves, P. E., 1956*. The ear plug of the Mysticeti as an indication of age with special reference to the North 

 Atlantic fin whale (Balaenoptera physalus Linn.). Norsk Hvalfangsttid. 45 Arg. (8), pp. 413-25- 



Lennep, E. W. van, 1950. Histology of the corpora lutea in blue and fin whales ovaries. Proc. Kon. Ned. Akad. v. Wet., 



vol. liii (4), pp. 593-9. 

 Lennep, E. W. van and Utrecht, W. L. Van, 1953. Preliminary report on the study of the mammary glands of whales. Norsk 



Hvalfangsttid. 42 Arg. (5), pp. 249-58. 

 Lillie, D. G., 1915. Cetacea. British Antarctic (Terra Nova) Exped., 1910, Zoology, vol. 1, no. 3, pp. 85-124. 

 Long, J. A. and Evans, H. M., 1922. The oestrous cycle in the rat and its associated phenomena. Mem. Univ. Calif, no. 6, 



pp. 1-148. 

 Mackintosh, N. A., 1942. The southern stocks of whalebone whales. Discovery Rep. vol. xxn, pp. 197-300. 



1946. The Antarctic Convergence and the distribution of surface temperatures in Antarctic waters. Discovery Rep. vol. xxni, 



pp. 177-212. 



Mackintosh, N. A. and Brown, S. G., 1956*. Preliminary estimates of the southern populations of the larger baleen whales. 



Norsk Hvalfangsttid. 45 Arg. (9), pp. 469-80. 

 Mackintosh, N. A. and Wheeler, J. F. G., 1929. Southern blue and fin whales. Discovery Rep. vol. 1, pp. 257-540. 

 McLaren, I. A., 1958. The biology of the ringed seal (Phoca hispida Schreber) in the eastern Canadian arctic. Bull. Fish Res. 



Bd Can. no. 118, vii + 97 pp. 

 Mansfield, A. W., 1958. The biology of the Atlantic walrus, Odobenus rosmarus rosmarus (Linnaeus) in the eastern Canadian 



Arctic. Fish. Res. Bd Can., MS. Rep. Ser. (Biol.), no. 653, xiii + 146 pp. 

 Marr, J. W. S., 1956*. Euphausia superba and the Antarctic surface currents. Norsk Hvalfangsttid. 45 Arg. (3), 



pp. 127-34. 



