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



Rattus rattus (Rodentia) 

 HEIN, Miss R. R. Ph.D., Prof. — Biol. Dept., Upsala College, Prospect St., EAST 



ORANGE, N.J. 07019, U.S.A. 

 a Effect of chemical agents (usually metals) on development and possible correlation with 



the effect of selected enzyme systems present in developing and regenerating tissues. 



Dugesia dorotocephala (Tucbellaria), ( Echinodermata) 

 HEIZMANN, P. Dr.Ing. — Sect, de Biol. Gener. et Appl., Univ. de Lyon I, 43 Bd. du 11 



Novembre 1918, 69 VILLEURBANNE, France 

 a Metabolisme des acides nucleiques. Euglena gracilis (Euglenophyceae) 

 HELFENBEIN, L. L. B.Sc. — Dept. of Biol., Kharkov State Univ., Dzerjinsky Square 4, 



KHARKOV, U.S.S.R. 

 a Investigations on the history of embryology, (particularly Invertebrata) 

 HELMSING, P. J. Dr. — Zool. Lab., Dept. of Cell Biol., Univ. of Nijmegen, Driehuizerweg 



200, NIJMEGEN, Netherlands 

 a Changes in nuclear protein patterns related with gene activation. Drosophila spec. (Diptera) 

 HEMING, B. S. Ph.D. — Dept. of Entomol., Univ. of Alberta, EDMONTON, Alta., Canada 

 a Metamorphosis. Frankliniella fusca, Haplothrips verbasci and other spp. (Thysanoptera) 

 b Parthenogenesis. Various spp. (Thysanoptera) 

 HEMMINGS, W. A. D.Sc. — Dept. of Zool., Univ. Coll. of North Wales, BANGOR, 



Caern., Wales, U.K. • 



HENDELBERG, J. Fil.Dr. — Zool. Inst., Univ. of Uppsala, Box 561, S-75122 UPPSALA 1, 



Sweden 

 a Spermiogenesis. (Platyhelminthes) 

 HENDRICKX, A. G. Ph.D. — ■ Div. of Biol. Growth and Developm., Southwest Found, for 



Res. and Educ, P.O.Box 28147, SAN ANTONIO, Tex. 78228, U.S.A. 

 HENLEY, Miss C. Ph.D. — Dept. of Zool., Univ. of North Carolina, CHAPEL HILL, N.C. 



27515, U.S.A. 

 HENNEN, Miss S. Ph.D. — Dept. of Biol., Marquette Univ., 530 N. 15th St., MIL- 

 WAUKEE, Wis. 53233, U.S.A. • 

 a Nucleo-cytoplasmic interactions in development. (Amphibia) 

 HENNIG, W. Dr.rer.nat. — Max-Planck Inst, fur Biol., Abt. Beermann, Spemannstr. 34, 



74 TUBINGEN, W.Germany 

 HERBERT, C. F. Ph.D. — Dept. of Biol. Sci., Portsmouth Polytechnic, Park Rd., PORTS- 

 MOUTH, England 

 a Development of the supraorbital glands. Pygoscelis adeliae (Aves) 

 b H 3 -thymidine studies of the developing neural crest. Xenopus laevis (Anura) 

 c Electron microscopy of the developing pituitary and median eminence in larvae. Same 



species as b 

 HERLANT (MEEWIS), Mrs. H. Dr.en Sci.Zool., Prof. — Lab. de Biol. Anim. et Histol. 



Comp., Univ. Libre de Bruxelles, Av. F.-D. Roosevelt 50, 1050 BRUXELLES, Belgium 

 HERMAN, L. Ph.D., Prof. — Dept. of Pathol., Downstate Med. Center, State Univ. of New 



York, 450 Clarkson Ave., NEW YORK, Brooklyn, N.Y. 11203, U.S.A. 

 a Electron microscopy of normal and urethane induced changes in embryonic neural tube 



cells and lung tissue cells. Mus musculus (Rodentia) 

 HERNANDEZ de BARRIOS, Mrs. C. E. M.D. — Cat. de Embriol., Fac. de Med., Univ. 



de Los Andes, MfiRIDA, Venezuela 

 a Histochemistry of the developing placenta. (Artiodactyla) , Homo sapiens (Primates) 

 HERNANDEZ (VERDUN), Mrs. D. F. Dr.3e Cycle — Inst. Natl, de la Sante et de la 



Rech. Med., Unite de Physiol, placent., Hop. Saint-Antoine, 184 rue du Faubourg Saint- 



Antoine, 75 PARIS Xlle, France 

 HEROLD, R. C. Ph.D., Prof. — Dept. of Histol. and Embryol., School of Dental Med., 



Univ. of Pennsylvania, 40th and Spruce Sts., PHILADELPHIA, Pa. 19104, U.S.A. 

 a Relation of dentinogenesis and dermal bone formation. Squalus acanthias (Selachii; 



Teleostei) , Amby stoma spec. (Urodela) 

 b Development of embryonic fine structure, mitochondria, and cell membrane; effect of 



chemical treatments. Echinarachnius parma (Echinoidea) 

 c Comparative development and ultrastructure of dentines (osteodentine and vasodentine). 



Esox lucius, Gadus callarias (Teleostei) 

 d Development of embryonic skeletal structure; normal ultrastructure and effect of sodium 



fluoride. Same species as b 

 HERRMANN, H. M.D., Prof. — Biol. Sci. Group, Genet, and Cell Biol. Sect., Univ. of 



Connecticut, STORRS, Conn. 06268, U.S.A. • 



a Protein synthesis in muscle of developing embryo. Gallus domesticus (Aves) 

 HESS, O. Dr.rer.nat., Prof. — Inst, fur Allgem. Biol., Univ. Diisseldorf, Mettmanner Str. 



16-18, 4000 DUSSELDORF, W.Germany • 



a Experimental embryology. (Mollusca) 



b Gene physiology, Y chromosome. Drosophila spp. (Diptera) 

 c Genetic regulation of differentiation; male germ line cells. Drosophila spp. (Diptera) 



77 



