HEIZMANN, P. Dr.Ing. — Sect, de Biol. Gener. et Appl.. Univ. de Lyon. 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) 

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



Caem.. Wales, U.K. 

 a Immunological relations of mother and fetus. (Mammalia ) 

 HENDELBERG. J. Fil.lic. — Zool. Inst.. Univ. of Uppsala. Villavagen 9, UPPSALA. 



Sweden 

 a Spermiogenesis (Plathelminthes) 

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



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

 a Descriptive morphology of the embryo (fertilization through fourth month). Papio spec. 



(Primates) 

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

 c Thalidomide induced anomalies. Papio spec. (Primates) 

 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 North 15th St., MIL- 

 WAUKEE. Wis. 53233. U.S.A. 

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



74 TUBINGEN. W.Germany 

 a Biochemical aspects of sperm differentiation: Y-chromosome function in spermatogenesis. 



Drosophila hydei (Diptera) 

 HENRIKSON. R. C. Ph.D. — Med. School. Boston Univ.. 80 E. Concord St., BOSTON. 



Mass. 02118, U.S.A. 

 HERBERT. C. F. B.Sc. — Dept. of Zool. and Comp. Anat., Univ. Coll. London. Gower St., 



LONDON W.C.I. England 

 a Investigation of early neurulation. Pygoscelis adeliae. P. antacctica, P. papua (Impennae, 



Aves) 

 b Investigation of the development of the supraorbital glands. Pygoscelis adeliae (Impennae, 



Aves) 

 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, BRUXELLES 5, 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. Miss C. E. M.D. — Cat. de Embriol. Fac. de Med.. Univ. de Los Andes, 



MfiRIDA. Venezuela 

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



Rech. Med.. Unite de Physiol, placentaire. Hopital Saint-Antoine. 184 rue du Faubourg 



Saint-Antoine. PARIS Xlle. France 

 a Electron microscopy of the placental membrane. Rattus norvegicus, Mus musculus (Roden- 

 tia) 

 HEROLD, R. C. Ph.D. — Dept. of Biol. Grad. School of Arts and Sci.; Lab. of Histol. and 



Embryol. School of Dental Med.. Univ. of Pennsylvania. PHILADELPHIA. Pa. 19104, 



U.S.A. 

 a Developmental study of flight muscle mitochondria structure and function (biochemistry and 



electron microscopy). Apis mellitera (Hymenopteca) 

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



chemical treatments. Echinarachnius pacma (Echinoidea) 

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



Esox lucius, Gadus callarius (Teleostei) 

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



fluoride. Echinarachnius parma (Echinoidea) 

 HERRMANN, H. M.D., Prof. — Inst, of Cell. Biol, Dept. of Zool, Univ. of Connecticut, 



STORRS, Conn. 06268, U.S.A. • 



HERZBERG, F. M.S. — Dept. of Anat.. Center for the Health Sci., Univ. of California, 



LOS ANGELES, Calif. 90024, U.S.A. 

 HESS, O. Dr.rer.nat. — Lab. fiir Chromosomenforsch., Biol. Inst. I der Univ., Schanzlestr. 11, 



7800 FREIBURG, 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) 

 HEWITT. W. M.B.. B.S. — Dept. of Anat.. St. Thomas's Hosp. Med. School. LONDON 



S.E.I. England 

 a Development of the brain. Homo sapiens and other spp. (Mammalia) 



76 



