140 THK rXlGS OF MAMMALS 



Hensen, V. 1869. Uber die Ziiclitunfi; unhernichteter Eier. Centr. med. 



Wissemch. 7, 403. 

 . 1870. Beobachtung fiber die Befruchtung iind Entvvicklung des 



Kaninchens und Meerschweinchens. Z. Anal. Eniwckimjs. 1, 213; 851. 

 Hertz, R. and IIisaw, F. L. 1934. l*]ffects of follicle-stinuilating and 



luteinizing pituitary extracts on the ovaries of the infantile and 



juvenile rabbit, jlm. J. Physiol. lOS, 1. 

 Heuser, C. H. and Streeter, G. L. 1929. Early stages in the develop- 

 ment of pig embryos. Carnegie Inst. Wash. Conirih. Embryol. 20, 1. 

 IIeys, Florence. 1929. Does regeneration follow complete ovariotomy 



in the albino rat? Science 70, 289. 

 . 1931. The problem of the origin of the germ cells. Quar. Rev. 



Biol. 6, 1. 

 Hill, J. P. 1910. The early development of the Marsupalia with especial 



reference to the native cat (Dasyurus viverrinus). Quar. J. Micr. 



Sc. 56, 1. 

 . 1918. Some observations on the early development of Didelphys 



aurita. Quar. J. Micr. Sc. OS, 91. 

 Hill, J. P. and Tuihe, M. 1924. The early development of the cat 



(Felis domestica). Quar. J. Micr. Sc. 6S, 513. 

 Hill, M. and Parkes, A. S. 1931. Attempts to promote the reformation 



of germ cells. /. Anat. 65, 212. 

 HiNDLE, E. 1910. A cytological study of artificial parthenogenesis in 



Strongylocentrotus purpuratus. Arch. Entwcklngsmechn, 31, 145. 



HiNSEY, J. C. and Markee, J. Vj. 1933. Studios on prolan-induced ovula- 

 tion in midbrain and midbrain-hypophysectomized rabbits. Am. J. 

 Physiol. 106, 48. 



HiSAW, F. L., Fevold, H. L., Foster, M. A. and Hellbaum, A. A. 1934. 

 A physiological explanation of the oestrus cycle of the rat. Anat, 

 Rec. 60 Sup p., 52. 



HuBER, G. C. 1915. The development of the albino rat, Mus norvegicus 

 albinus. I. From the pronuclear stage to the stage of the mesoderm 

 anlage; end of the first to end of the ninth day. /. Morphol. 26, 247. 



HuBRECHT, A. A. W. 1912. Friihe Entwickhmgsstadien des Igels und ihre 

 Bedeutung fiir die Vorgeschichte (Phylogenese) des Amnions. Zool. 

 Jahrb. Supp. XV, 2, 739. 



Humphrey, R. R. 1928. The developmental potencies of the intermediate 

 mesoderm of amblystoma when transplanted into ventro-lateral sites 

 in other embryos: the primordial germ cells of such grafts and their 

 role in the development of a gonad. Anat. Rec. Jfi, 67. 



