HOMANN, H. Dr.rer.nat. — I. Physik. Inst., Univ. Gottingen, Bunsenstr. 9, 34 GOT- 



TINGEN, W.Germany 

 a Development of eyes. (Araneae, Oxyopidae. Ctenidae, Zoropsidae. Agelenidae. Dysderidae, 



Philodromidae, Araneida) 

 HOPERSKAYA, Mrs. O. A.— Inst, of Developm. Biol., Acad, of Sci. of the U.S.S.R., 



Vavilov St. 26, MOSCOW B-133, U.S.S.R. 

 a Transfilter induction of lenses, neural and retinal tissues by eye rudiments in gastrula 



ectoderm and the dependence of their appearance of the duration of induction. Rana 



temporaria (Anura) 

 b Analysis of inductive interactions of the cells of differentiating retina by means of com- 

 binations of cells of the eye rudiment and gastrula ectoderm. Rana temporaria, R. esculenta 



(Anura), Callus domesticus (Aves) (in collaboration with G. V. LOPASHOV) 

 c Analysis of conditions of the initiation of development and the positioning of axial rudiment 



in the early blastoderm. Leuciscus becgi (Cyprinidae), Epiplatys shaped (Cyprinidontidae, 



Teleostei) 

 HORI, R. D.Sc. — Biol. Inst., Fac. of Lit. and Sci., Toyama Univ., Gofuku 3190, TOYAMA 



(930) Japan 

 a Sodium and potassium content, ionic permeability and fertilization phenomena (radioisotope 



studies). Hemicentrotus pulcherrimus (Echinoidea), Oryzias latipes (Teleostei) 

 HORIKAWA, M. D.Sc. — Dept. of Genet., Univ. of Wisconsin, MADISON, Wis. 53706. 



U.S.A. • 



HORKf, Z. M.D. — Dept. of Obstet. and Gynecol., Med. School, Univ. of Greifswald, 



X 22 GREIFSWALD, East.Germany 

 HORN, E. C. Ph.D., Prof. — Dept. of Zool., Duke Univ., DURHAM, N.C. 27706, U.S.A. 

 a Isolation and characterization of cytoplasmic histones in embryonic cells. (Amphibia) 

 h Hemolymph protein changes and carotenoid pigment distribution during the reproductive 



cycle. Callinectes sapidus (Decapoda, Crustacea) 

 c Ontogenesis of the immune mechanism. (Marsupialia) 

 HORNBLAD, P. Y. M.D. — Lab. of Teratol., Karolinska Inst., S-104 01 STOCKHOLM 60, 



Sweden 

 a Experimental studies on closure of the ductus arteriosus and causes of its patency. Oryc- 



tolagus cuniculus (Lagomorpha), Mus musculus, Rattus norvegicus, Cavia porcellus (Rod' 



entia), Sus domesticus, Ovis aries (Artiodactyla) 

 HORNBY, Miss J. E. B.Sc. — Dept. of Zool., Fac. of Sci., Univ. of Reading. READING 



RGl 5AQ, Berks, England 

 a Studies on the adhesion of embryonic cells (Aves; Mammalia) 

 HORSFALL. W. R. Ph.D.. Prof. — Dept. of Entomol., Univ. of Illinois, 320 Morrill Hall, 



URBANA, 111. 61801, U.S.A. 

 a Imaginal teratogenesis by thermal stress (morphological and histological changes). Aedes 



sierrensis, A. punctor, A. communis, A. stimulans, A. nigripes, A. impiger (Culicidae, 



Dipfera) 

 H5RSTADIUS, S. Fil.Dr., Prof. — Zool. Inst., Univ. of Uppsala, Villavagen 9, UPPSALA, 



Sweden • 



a Determination in the egg; analysis of the gradients and the processes behind them. 



(Echinoidea) 

 b The effect of various antimetabolites on embryonic development. (Echinoidea) 

 HORSTMANN, E. Dr.med. et phil.. Prof. — Anat. Inst, der Univ. Hamburg, Martinistr. 52. 



2000 HAMBURG-Eppendorf, W.Germany 

 a Spermatozoen und ductus epididymidis. Oryctolagus cuniculus, Canis familiaris. Homo 



sapiens (Mammalia) 

 h Electron microscopic studies of spermatozoa and spermatogenesis. Ornithodorus moubata 



(Argasidae; Acarina), Ceophilus linearis (Chilopoda), Craphidostreptus spec. (Diplopoda) 

 HORSTMANN, H.-J. Dr.phil.nat. — Physiol.-Chem. Inst, der Univ. Erlangen-Niirnberg, 



Wasserturmstr. 5, 852 ERLANGEN, W.Germany 

 (no embryological work in progress) 

 HORTON, K. M. A.B. — 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 Hormonal interactions and protein synthesis in mature oocytes. Xenopus laevis (Anura) 

 HORVATH, Miss C. M.D. — Inst, of Histol. and Embryol., Med. Univ., Tiizolto u. 58, 



BUDAPEST IX, Hungary 

 a Teratogenesis. Callus domesticus (Aves), Rattus rattus (Rodentia) 

 HOSHI, M. M.Sc. — Biol. Inst., Coil, of Gen. Educ, Univ. of Tokyo, Komaba, Meguro-ku, 



TOKYO, Japan 

 HOSHINO, K. M.D.. D.med.Sc. Prof. — Dept. of Anat., Health Sci. Center, Univ. of 



Western Ontario, LONDON, Ont., Canada 

 a Development and growth of mammary glands after prenatal exposure to hormones and 

 carcinogen. Mus musculus (Rodentia) 



79 



