HARTUNG, E. W. Ph.D. — Dept of Zool., Univ. of Rhode Island, 

 KINGSTON, R.I., U.S.A. 



a. Factors influencing tumor incidence. A study of the developmental, en- 

 vironmental and genetic factors operative in the development of socal- 

 led "melanin tumors". Drosophila melanogaster (Diptera) 



b. Studies on symmetry. (Gastropoda) 



HARTWIG, H. DrPhil. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13. 



KOLN-LINDENTKAL, Deutschland 

 a. Wirkungsmechanismus von Schilddriisenhormon. 

 HARVEY, Mrs E. BROWNE F.I.I.E., A.B., M.A., Ph.D. — Dept of Biol. 



Princeton Univ., PRINCETON, N.J., U.S.A. 



a. Centrifuging eggs, and development of fractions obtained by centrifugal 

 force. Parthenogenetic merogony or development without nuclei. (Echi- 

 noidea) 



b. Monograph, including classified compilation of all experimental work. 

 Arbacia punctulata (Echinoidea) 



c. Moving pictures of metamorphosis and of the natural history (in color). 

 Arbacia punctulata (Echinoidea) 



d. Determination of sex by electrical method. Arbacia punctulata 

 HARVEY, E. B. B.S., M.A., Ph.D. — Dept of Zool., Univ. of Calif., 



DAVIS, Cal., U.S.A. 

 a. Comparative microscopic study of placentation. (Rodentia, Lagomorpha) 

 HASSA, O. DrVet.Sc. — Dept of Histol., Veterinary Fac, ANKARA, 



Turkey 

 HAY, D. — Lab. de Zool., Inst, de Zool. et de Biol, gen., Fac. des Sci., 



12 Rue de I'Universite STRASBOURG. France 

 a. Analyse du processus de regulation et de paragenese. (Selachii) (en 



collaboration avec J. VIVIEN et J. SCHOTT) 

 HAYASHI. Y. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa- 



Ku, NAGOYA, Japan 



a. Isolation of pentose-nucleoproteins with regional inducing effects. Studies 

 of their electrophoretic patterns and active loci. (Amphibia, Mammalia) 

 (in collaboration with T. YAM AD A and K. TAKATA) 



b. Chemical embryology of the blood island. (Amphibia) (in collaboration 

 with T. YAM AD A and K. TAKATA) 



HEATH, H. D. Ph.D. — Dept of Biol. Sci., Stanford Univ., STANFORD. 



Cal, U.S.A. 

 HECKERMAN, R. O. B.S., M.S., Ph.D. — Dept of Biol. (Embryol. Divi- 

 sion), Duquesne Univ., PITTSBURG 19, Pa, U.S.A. 

 a. Differentiation of cells in the islet tissue of the embryonic pancreas. 



Callus domesticus (Aves), Sus domesticus (Mammalia) 

 HEIDE, H. V. d. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, 



UTRECHT, Holland 

 a. Cytochemistry of polysaccharides during development. Limnaea stagna- 



lis (Gastropoda) 

 HEILBRUNN, L. V. Ph.D., Prof. — Dept of Zool., Univ. of Pennsylvania, 



PHILADELPHIA 4, Pa, U.S.A. 

 HEIM, W. G. A.B.. M.A., Ph.D. — Dept of Agric, Univ. of Calif., LOS 



ANGELES, Cal., U.S.A. 

 a. The role of catalase in growth and neoplasia. 



45 



