a Influence of genes on pollentube growth (certation) and embryosac 

 development. Oenothera spec. (Onagraceae) , Antirrhinum spec, (bcro- 

 phulariaceae) 



b. Action of lethal genes on embryos and endosperm. Oenothera spec. 



(Onagraceae) 



HARTUNG E. W. Ph.D. — Dept. of Zool., Univ. of Rhode Island, KING- 

 STON." R.I.. U.S.A. rr 



HARTWIG. H. Dr.Phil. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, 

 KoLN-LINDENTHAL, Deutschland 

 a Wirkungsmechanismus von Schilddrusenhormon. 



HARVEY Mrs. E. BROWNE A.B., M.A.. Ph.D., Sc.D., F.I.I.E. — Dept. 

 of Biol.. Princeton Univ.. PRINCETON. N.J., U.S.A. 

 a Centrifuging eggs, and development of fractions obtained by centrifugal 

 force. Parthenogenetic merogony or development without nuclei. 

 (Echinoidea) . . 



b. Book, including classified compilation of all experimental work. Arbacia 



punctulata (Echinoidea) 



c. Moving pictures of metamorphosis and of the natural history (in color). 

 Arbacia punctulata (Echinoidea) 



d. Determination of sex by electrical method. Arbacia punctulata (Echi- 

 noidea) 



e Prophase of the egg. Arbacia punctulata (Echinoidea) 



f. Study of crescent-shaped figure in the egg. Arbacia punctulata (Echi- 

 noidea) , 



g. Effect of "theelin" on the egg. Arbacia punctulata (Echinoidea) 

 HARVEY E. B. B.S., M.A., Ph.D. — Dept. of Zool. and Entomol., Mon- 

 tana State Coll., BOZEMAN, Montana, U.S.A. 



(no embryological work in progress) 

 HASEGAWA, M. M.A. — Embryol. Div., Dept. of Anim. Husbandry, Fac. 

 of Agriculture, Nagoya Univ., ANJO-City, Japan 



a. Restitution of the eye after removal of the retina and lens. ( 1 eleostei) 



b. Regeneration of the liver. Ga//us domesticus (Aves) 



HAsEK M. M.D., M.I.I.E. — Dept. of Exp. Biol, and Genet., Inst of Biol., 

 Czechoslovak Acad, of Sci., Na cvicisti 2, PRAHA 6, Czechoslovakia 



a. Experimental embryonic parabiosis. Ga//«s domesticus, Meleagns gal- 

 lipavo, Anas platyrhynchus, Numida meleagris ( Aves ) 



b Natural embryonic parabiosis. Ovis domestica (Artiodactyla) 



Interspecific "graft-hybrids" in tolerant animals. Gallus domesticus, 

 Meleagris gallipavo (Aves) d„««. 



Effect of intrauterine irradiation on development of the embryo. Hattus 



rattus (Rodentia) . ,~ /7ffC 



Effect of the reduced immunological reactivity on distant crossing. Callus 



domesticus, Numida meleagris (Aves) 

 HASSA O. Dr.Veter.Sc. — Inst, of Histol. and Embryol., Veter. Coll. of the 

 Univ., ANKARA, Turkey 



(no embryological work in progress) TArra „K 



HATHAWAY, R. — Oceanographic Inst., Florida State Univ., lALLAn^- 

 SEE, Florida, U.S.A. 

 a. Release of S^ from labelled fertilizin by sperm. Arbacia spec. (Ecnnoi- 

 dea) (in collaboration with C. B. METZ) 



55 



c. 

 d. 

 e. 



