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

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



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

 Gallus domesticus (Aves), Sus domesticus (Mammalia) 



b. Islet tissue regeneration. Gallus domesticus (Aves) 

 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 Biol.. Wayne State Univ.. 



DETROIT 2, Mich., U.S.A. 

 a. Role of catalase in growth and neoplasia. Mus musculus, Mus rattus 



(Rodentia) 

 HEMMINGS. W. A. B.A. — Agr. Res. Council Unit of Embryol., Dept of 



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



Wales 

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

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



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

 HENZEN, W. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz 

 HERLANT— MEEWIS, Mrs H. Dr Zool. — Lab. de Zool., Fac. des Sci., 



Inst. Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Avenue F. D. 



Roosevelt, BRUXELLES, Belgique. 

 HERRMANN. H. Dr. Prof. — Div. Chem. Embryol.. Med. Center, Univ. 



of Colorado, 4200 East Ninth Ave, DENVER 20, Colo, U.S.A. 



a. Chemistry of muscle differentiation. Gallus spec. (Aves) in collaboration 

 with I. R. KONIGSBERG and A. J. SAMUELS) 



b. Study of developmental disturbances related to nutritional deficiencies 

 investigated by application of anti-vitamins and anti-amino acids to the 

 intact egg and to explants (somites). (Aves) (in collaboration with 

 Mrs U. ROTHFELS KONIGSBERG) 



c. Analysis of muscle tissue grown in vitro. Homo sapiens (Primates) 

 (in collaboration with Mrs U. ROTHFELS KONIGSBERG) 



HERTIG, A. T. B.S., M.D., Prof. — Dept of Pathol, Harvard Univ., Med. 

 School, 25 Shattuck St, BOSTON 15, Mass., U.S.A. 



— Boston Lying-in Hospital, 221 Longwood Ave, BOSTON 15, Mass. 



— Free Hospital for Women. 245 Pond Ave, BROOKLINE, Mass. 



a. Histochemical observations on early fertilized ova of less than 14 days 

 age. Homo (Primates) (in collaboration with J. ROCK, W. J. MULLI- 

 GAN and Miss E. C. ADAMS) 



b. Histochemical studies on developing embryos. Homo (Primates) (in 

 collaboration with D. G. McKAY and Miss E. C. ADAMS) 



c. Histochemical studies on abnormal trophoblast with special reference to 

 hydatidiform mole and chorionepithelioma. Homo (Primates) (in colla- 

 boration with D. G. McKAY. K. BENIRSCHKE. W. BARDAWIL 

 and Miss E. C. ADAMS) 



HESS. O. Dr rer.nat. — Zool. Inst, der Technischen Hochschule. DARM- 

 STADT, Deutschland 

 a. Entwicklungsphysiologie. Bithynia tentaculata, Limnaea stagnalis (Gas- 

 tropoda) 



HEUSER. C H. F.I.I.E.. Prof. — Dept of Micr. Anat.. Med. Coll. of 

 Georgia. AUGUSTA, Ga, U.S.A. 



49 



