Hca-Hey 



a. Growth and form regulation. Hydra viridis (Hydroidea) 

 h. Embryology. (Invertebrata) 

 HEATH. H. D. Ph.D. — Dept. of Biol. Sci., California State Coll.. HAY- 

 WARD, Calif.. U.S.A. 



a. Growth of larvally transplanted organs. Ambystoma tigrinum (Urodela) 



b. Developmental phenomena. Hydra Uttoralis (Hydroidea) 

 HEAYSMAN. Mrs. J. E. M. WAKELING B.Sc, Ph.D. — Dept. of Zool. 



and Comp. Anat., Univ. Coll. London. Gower St.. LONDON W.C.I. 



England 

 a. Study of cell relations in tissue culture. Gallns galltis (Aves), Mus 



musculus (Rodentia) (in collaboration with M. ABERCROMBIE) 

 HEBARD. Miss C. N. A.B. — Dept. of Biol. School of Dental Med.. Univ. 



of Pennsylvania. PHILADELPHIA, Pa. 19104. U.S.A. 

 a. Structure of cortical cytoplasm before and after fertilization and in early 



cleavage. Xenopus laevis (Anura) 

 HECKERMAN, R. O. B.S., M.S.. Ph.D.. Prof. — Dept. of Biol. Sci.. Quin- 



cy Coll.. QUINCY. 111., U.S.A. 

 HEGGESTAD. C. B. M.D.. Ph.D.. Prof. — Dept. of Anat.. School of Med., 



Univ. of Minnesota, MINNEAPOLIS. Minn. 55455, U.S.A. 

 a. Morphological and physiological effects of maternal endocrine deficien- 

 cy: experimental diabetes mellitus. Raftus norvegicus (Rodentia) 

 HEIM, W. G. A.B., M.A., Ph.D.. M.I.I.E.. Prof. — Dept. of Biol., Wayne 



State Univ., DETROIT, Mich. 48202. U.S.A. 



a. Serum proteins during ontogeny. Gallus domesticus (Aves)^ Mus raftus 

 (Rodentia) 



b. Alpha-2 macroglobulin during development, regeneration, and various 

 physiological states. Mus raftus (Rodentia) 



HEINEMANN. F. Ph.D. — Dept. of Cell Biol, and Chem. Embryol.. Zool. 

 Inst.. Univ. of Bern. Sahlistr. 8. BERN. Switzerland 

 a. Primary effects of thyroxine on larval tails. Xenopus laevis (Anura) 

 (in collaboration with R. WEBER) 

 HEIZMANN. P. Ing.Chim. — Lab. de Zool. exper., Fac. des Sci. de Lyon. 

 43 Bd. de rHippodrome, VILLEURBANNE, France 

 a. Mctabolisme des acides nucleiques. Euglena gracilis (Flagellata) 

 HELFENBEIN, L. L. B.Sc. — Dept. of Biol, Kharkov State Llniv.. Dzer- 

 jinsky Square 4. KHARKOV. U.S.S.R. 

 a. Investigations on the history of embryoloqy. (particularlv Invertebrata) 

 HEMMINGS. W. A. B.A., D.Sc. — A.R.C. Unit of Embryol. Dept. of 

 Zool. Univ. Coll. of North Wales, BANGOR. Caernarvonshire. Wales 

 a. Immunological relations of mother and fetus. (Mammalia) 

 HEMPEL, G. Dr. — Inst, fiir Hydrobiol und Fischereiwiss., Univ. Ham- 

 burg. Olbersweg 24, 2 HAMBURG-Altona 1. Deutsche Bundes- 

 republlk 

 HENDRICKX, A. G. B.A., M.S.. Ph.D. — Southwest Foundation for 

 Research and Education, P.O.Box 2296, 10.000 West Commerce. SAN 

 ANTONIO, Tex., U.S.A. 



a. Descriptive morphology of the embryo (second week through fourth 

 month). Pap/o spec. (Primates) 



b. Determination of ovulation time. Papio spec. (Primates) 



HENLEY, Miss C. M.A., Ph.D.. — Dept. of Zool, Univ. of North Caro- 

 lina, CHAPEL HILL, N.C., U.S.A. 



