a. Studies in experimental cytology. Polychoerus spec. (Acoela. Turbel- 

 laria) , Chaetoptems pergamentaceus (Polychaeta) (in collaboration 

 withD. P. COSTELLO) 



b. Effects of antimitotic agents on eggs. Chaetoptems pergamentaceus 

 (Polychaeta), Asterias forbesii (Asteroidea) (in collaboration with D. 

 P. COSTELLO) 



HENNEN. Miss S. Ph.D. — Dept. of Zool, Indiana Univ.. BLOOMING- 

 TON, Ind., U.S.A. 



a. Interspecific transfer of embryonic nuclei. Rana pipiens. R. palustris, R. 

 sylvatica (Anura) 



b. Chromosome analysis of nuclear transplant embryos. R. pipiens, R. 

 palustris. R. sylvatica (Anura), Amhy stoma mexicanum (Urodela) 



HERLANT (MEEWIS). Mrs. H. Dr. en Sci. Zool.. Prof. — Lab. de 

 Zool. syst. et de Biol, anim., Fac. des Sci., Univ. libre de Bruxelles, 50 

 Avenue F. D. Roosevelt, BRUXELLES, Belgique 



a. Endocrinology and growth. Eisenia foetida ( Oligochaeta) . Nereis 

 diver sicolor (Polychaeta) 



b. Reproduction and regeneration. Eisenia foetida (Oligochaeta) , Nereis 

 diversicolor (Polychaeta) 



HEROLD, R. C. B.S.. M.S., Ph.D. — Dept. of Histol. and Embryo!.. School 

 of Dental Med.. Univ. of Pennsylvania, 4001 Spruce St., PHILADEL- 

 PHIA, Pa. 19104, U.S.A. 



a. Developmental study of flight muscle mitochondria structure and func- 

 tion (biochemistry and electron microscopy). Apis mellifera (Hymenop- 

 tera) 



h. Development of embryonic fine structure, mitochondria and cell mem- 

 brane: effect of chemical treatments. Echinarachnius parma (Scutelli- 

 dae, Exocyclica, Echinoidea) 

 HERRMANN, H. M.D.. M.I.I.E.. Prof. — Inst, of Cellular Biol., Dept. of 



Zool., Univ. of Connecticut. STORRS, Conn., U.S.A. 

 HERZBERG, F. B.S., D.D.S., M.S. — Dept. of Anat., Center for the 

 Health Sciences, the Univ. of California, LOS ANGELES 24. Calif.. 

 U.S.A. 



a. Effects of massive doses of ionizing radiation on growth and reproduc- 

 tion. Helix aspersa (Pulmonata, Gastropoda) 

 HESS, O. Dr.rer.nat. — Max Planck Inst, fiir Biol., Spemannstr. 34, 

 TUBINGEN, Wiirttemberg, Deutsche Bundesrepublik 



a. Experimental embryology. (Mollusca) 



h. Developmental physiology. (Mollusca) 



c. Gene function and differentiation of male germ cells, cytogenetics. Dro^ 

 sophila spp. (Diptera) 



HESSELSJO, R. Med.lic. — Dept. of Anat.. Univ. of Gothenburg. G5TE- 



BORG-SV, Sweden 

 HEUSER. C. H. M.I.I.E., Prof. — Eugene Talmadge Memorial Hosp., 



Med. Coll. of Georgia, AUGUSTA. Ga.. U.S.A. 

 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) 

 HEYN. A. N. J. Prof. — Dep. of Biol., Louisiana State Univ. in New 

 Orleans. Lake Front. NEW ORLEANS, La. 70122, U.S.A. 

 a. Egg shell formation and structure. Gallus domesticus (Aves) 



