HOLT (SULEY), Mrs. A. C. E. Ph.D. — Dept. of Zool., Reading Univ., Whiteknights 



Park, READING RG6 2AJ, England 

 a Developmental genetics, especially of variegated phenotypes. Mesocricetus auratus 



(Rodentia) 

 HOLT, Th. K. H. Drs. — Zool. Lab., Dept. of Cell Biol., Univ. of Nijmegen, Driehuizerweg 



200, NIJMEGEN, Netherlands 

 a Structural changes in chromosome loci following gene activation. Drosophila spec, 



Chironomus spec. (Diptera) 

 HOLTER, H. Ph.D. — Physiol. Dept, Carlsberg Lab., 10 Gl.Carlsbergvej, 2500 COPEN- 

 HAGEN, Valby, Dennmark • 

 HOLTFRETER, J. K. F. Ph.D., Prof. — Dept. of Biol., Univ. of Rochester, ROCHESTER, 



N.Y. 14627, U.S.A. • 



a Cell physiology: amoeboid motility and locomotion; protoplasmic streaming; cellular fusion 



and fission; membrane formation; food preferences; digestive enzymes; phago-pinocytosis; 



cytotaxis. Amoeba spec. (Rhizopoda), Physarum spec, Fuligo spec. (Eumycetozoina) 

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



TINGEN, W.Germany 

 a Eye development. Zora (Zoridae; Philodromidae, Araneida) 



HONJO, T. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W.University Park- 

 way, BALTIMORE, Md. 21210, U.S.A. 

 a Regulation of nucleic acid synthesis in early development. Xenopus laevis (Anura) (with 



R. H. REEDER) 

 HOPERSKAYA, Mrs. O. A. Cand.biol.sci. — Inst, of Developm. Biol., Acad, of Sci. of the 



U.S.S.R., Vavilov St. 26, MOSCOW 117133, 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 Inductive interactions of the cells of differentiating retina by means of combinations of 



cells of the eye rudiment and gastrula ectoderm. Rana temporaria (Anura), Gallus domesti- 



cus (Aves) (with G. V. LOPASHOV) 

 c Conditions of the initiation of development and the positioning of axial rudiment in the 



early blastoderm. Leuciscus bergi (Cyprinidae), Epiplatys shaped (Cyprinidontidae, 



Teleostei) 

 HOPPE, P. C. Ph.D. -, The Jackson Lab., BAR HARBOR, Me. 04609, U.S.A. 

 a Studies on ova in vivo and in vitro, especially in vitro fertilization, energy 



requirements for first cleavage, and fusing ova with embryoid bodies and their subsequent 



fetal development. Mus musculus (Rodentia) 

 HORAK, I. — Dept. of Embyol., Carnegie Inst, of Washington, 115 W.University Parkway, 



BALTIMORE, Md. 21210, U.S.A. 

 a Regulation of synthesis of nuclear and cytoplasmic mitochondrial nucleic acids during 



early development. Rana pipiens, Xenopus laevis (Anura) (with I. DAWID and G.-J. 



WU) 

 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, water soluble proteins, and fertilization 



phenomena (radioisotopes, thin-layer chromatography, electrophoresis). Hemicentrotus 



pulchercimus (Echinoidea), Oryzias latipes (Teleostei) 

 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. 



Oryctolagus cuniculus (Lagomorpha), Mus musculus, Rattus norvegicus, Cavia porcellus 



(Rodentia), Sus domesticus, Ovis aries (Artiodactyla) 

 HORNBY, Miss J. E. B.Sc — Dept. of Zool., Univ. of Reading, Whiteknights Park, 



READING RG6 2AJ, England 

 a Adhesion of embryonic cells. Gallus domesticus (Aves) 



b Tissue interaction in differentiation of skin and hair. Mesocricetus auratus (Rodentia) 

 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; sensitive 



period). Aedes sierrensis, A. punctor, A. communis, A. stimulans, A. dianteus, A. cataphylla, 



A. excrucians, A. barri et al. (Culicidae, Diptera) 

 HORSTADIUS, S. Fil.Dr., Prof.(Emer.) — Zool. Inst., Univ. of Uppsala, Box 561, 



S-75122 UPPSALA 1, 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) 



80 



