Hartung ^0 Hem 



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

 vironmental and genetic factors operative in the development of so-called 

 "melanin tumors". Drosophila melanogaster (Insecta) 

 HARTWIG, H. Dr Phil. — Inst. f. Entw. physiol., Kerpenerstr. 13, KoLN- 

 Lindenthal, Deutschland. (no data received over this year) 



HARVEY, Miss E. B. 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. (Echino- 

 dermata) 

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

 Arbacia punctulata (Echinoidea) 

 HARVEY, E. B. B.S. — Dept of Zool., Univ. of Cahfornia, BERKELEY 4, 

 Cahf., U.S.A. 

 a. The effects of high hydrostatic pressure coupled with centrifugation on 

 development of eggs. (Invertebrata and Anamnia) 

 HASEGAWA, M. M.A. (Rigakushi) — Biol. Inst., Fac. Sci., Nagoya 

 Univ., Chigusa-Ku. NAGOYA. Japan, 

 a. Restitution des Auges. Hynobius tokyoensis (Urodela) 

 HAY, E. D. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. 

 a. Contribution of epidermis to the hmb regeneration blastema as demon- 

 strated by transplantation of heteroploid epidermis. (Amphibia) 

 HAYES, E. R. Ph.D., Prof. — Dept of Anat., Ohio State Univ.. COLUM- 

 BUS 10, Ohio. U.S.A. 

 (no data received over two years) 

 HEATH. H. D. Ph.D. — Dept of Zool.. Washington Univ.. Lindell and 

 Skinker Aves. ST LOUIS 5. Mo., U.S.A. 

 a. Experiments on the growth and regeneration of chimaeric limbs, to test 

 ( 1 ) the epidermal contribution to the regeneration cells of the blastema 

 and (2) size regulation of hmbs composed of two portions of differing 

 growth rate. Tritutus torosus. Amblystoma spp. (Urodela) 

 HEAYSMAN. Miss J. E. M. B.Sc. — Dept of Embryol.. Univ. Coll. Lon- 

 don, Gower Str.. LONDON W.C. 1. England (U.K.) 

 a. Cinematographic study of cell relations in tissue culture. Gallus domes- 

 ticus (Aves) (in collaboration with M. ABERCROMBIE) 

 HECKERMAN, R. O. M.S. — Univ. of Pittsburgh, PITTSBURGH. Pa, 

 U.S.A. 



a. Effect of alloxan on the islet cells of the pre-metamorphosed tadpole 

 pancreas. Rana catesbiana (Anuta) 



b. In vitro development and differentiation of the dorsal and ventral 

 pancreatic diverticulae. A further determination of islet cell origin. Galus 

 galus (Aves) 



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

 PHILADELPHIA 4, Pa, U.S.A. 

 (no data received over two years) 

 HEIMANN, H. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ.-khnik. 

 Med. Fak., Waldau, BERN, Schweiz. 

 a. Endhirnentwicklung. (Teleostei) 

 HEMMINGS, W. A. B.A. — Dept of Zool., Univ. Coll. of N. Wales, 

 BANGOR, Caernarvonshire, N. Wales (U.K.) 

 a. Study of the immunological relations of mother and foetus. (Mammalia) 



