Holtfr 82 Hum 



HOLTFRETER, J. K. F. Effects of carcinogens on successive develop- 

 mental stages of amphibian embryos. Hid. 2. J. 



HOOKER, D. (data not yet received). 



HORN, E. C. Embryology and development of Haploscoloplos bustoris 

 (Polychaeta). II. 2a. C. 



(in collaboration with C. G. BOOKHOUT) 



HORST, C. J. van der The placentation of Elephantulus myurus 

 jamesoni. I. 3. M. 



Elephantulus myurus jamesoni going into anoestrus. I. 17. M. 



Post-partum phenomena in Elephantulus myurus jamesoni. I. 17. M. 



The placenta of Tupaia jauanica. I. 3. M. 



HORSTADIUS, S. Analysis of the gradients and the processes behind 



them in the sea urchin egg. Illb. lc. G. 



Investigations if there occur any changes in the nucleus in course 



of differentiation. Sea urchin egg. Illb. 19. G. 



HOUSSAY, B. A. (data not yet received). 



HUANG, A. C. (data not yet received). 



HUBER, W. Recherches experimentales sur le developpement de la 

 tete chez le Poulet, Gallus domesticus. Ilia. 2b. L. 



(en collaboration avec E. WOLFF) 



HUBL, H. Geschwulstproblem, bearbeitet durch Regeneration und 

 Transplantation an Lumbricus (Annelida). Hid. 5. C. 



HUESTIS, R. R. Investigations on the development of several asym- 

 metrical mutations involving the tail and the eye in Peromyscus, 

 the deer mouse. Hie. 3. M. 



HUGON de SCOEUX, Mile F. Essai de filtration, "in vivo", de la 

 substance inductrice a l'aide de membranes de porosite connue, sur 

 des explantats de jeunes gastrulas. Axolotl (Urodeles) . Illb. 7. d. J. 



HUIJBERS, Miss M. M. Investigations to the function of the gonad 

 in the c/izc/c-embryo by implantation and castration experiments. 



Illb. 17. L. 



HULTIN, J. M. T. Nitrogen metabolism in early sea urchin develop- 

 ment studied by means of N-labelled ammonia. Illb. 2c. b. G. 



Protein turnover of different cell fractions of chicken liver studied 



by injection of N-labelled amino acids. The liver is afterwards 

 homogenized and fractionated by centrifugation. Illb. 13. c. L. 



HUMMEL, Miss K. P. Studies on the form and function of ovaries 

 which have been grafted into spleens of castrates and subsequently 

 retransplanted into normal position within the ovarian capsule of 

 a normal mouse. Offspring of these ovaries are examined for 

 abnormalities which may be correlated with the time the graft 

 remained in the spleen. Mus musculus. Hid. 2. M. 



(in collaboration with C. C. LITTLE) 



HUMPHREY, R. R. Studies on spontaneous haploidy and polyploidy. 

 Amblystoma (Siredon) mexicanum. IIIc. 2. J. 



The offspring of polyploids; their chromosome number, mortality, 



pathology, etc. Amblystoma (Siredon) mexicanum. IIIc. 2. J. 



Study of progeny of triploid, tetraploid an other heteroploid in- 

 dividuals among axolotls. IIIc 2. J. 

 (in collaboration with G. FANKHAUSER) 



