a. Regeneration of defective organs. (Amphibia) 



b. Morphogenetic effect of homologous DNA administered to eggs and em- 

 bryos. Siredon mexicanum, Xenopus spp. (Amphibia) 



NEYFAKH, A. A. Dr.Biol.Sci. — Inst, of Animal Morphol., Acad, of Sci. of 

 the U.S.S.R., First Academic St. 12, MOSCOW V-133, U.S.S.R. 



a. Nucleo-cytoplasmic interaction in development: the role of the nucleus 

 in biochemical differentiation. Misgurnus [ossilis (Teleostei) 



b. Mitochondria in development. 



NIAZI, I. A. B.Sc, M.Sc, Ph.D. — Dept. of Zool.. Univ. of Rajasthan, JAI- 

 PUR, Rajasthan, India 



a. Histological studies of regeneration. Ammocoetes larvae (Pettomyzonti- 

 dae, Cyctostomata), (Anura) 



b. Role of thyroid in regeneration. (Ranidae, Anura) 



f NICHOLAS, J. S. Ph.D., F.I.I.E., Prof. — Dept. of Biol. (Osborn Lab.), 



Yale Univ., NEW HAVEN 11, Conn., U.S.A. 



(deceased) 

 NICOLET, G. Lic.Sc. — Lab. d'Embryol. exper., Inst. d'Anat, Fac. de Med., 



Univ. de Geneve, 20 Rue de l'Ecole de Med., GEN£VE, Suisse 



a. The action of Lithium chloride on the embryo. Gallus domesticus (Aves) 



b. Studies of the fate of the different parts of the primitive streak with the 

 help of the grafts labelled with tritiated thymidine. Gallus domesticus 

 (Aves) 



NIE, C. J. van D.V.M. — Veter. Anat. and Embryol. Inst., State Univ. of 

 Utrecht, Bekkerstr. HI, UTRECHT. Netherlands 

 — private address: Pasteurstr. 1, LEIDEN, Netherlands 



a. Ontogenetic malformations of the heart. Sus scrofa, Bos taurus (Artiodac- 

 tyla) 



b. Collecting hearts of foetus from mothers, recovered from viruspest, in 

 order to investigate the possible influence on the development of the heart. 

 Sus scrofa ( Artiodactyla) 



f NIESSING, K. Dr.Med., o.Prof. — Anat. Inst, der Univ., Robert Koch- 



str. 6, MARBURG/Lahn, Deutsche Bundesrepublik 



(deceased) 

 NIEUWENHUYS, R. Dr. — Netherlands Central Inst, for Brain Research, 



Mauritskade 59B, AMSTERDAM O., Netherlands 

 NIEUWKOOP, P. D. Phil.Dr., F.I.I.E., Prof. — Hubrecht Lab. (Intern. 



Embryol. Inst.), p/a Universiteitscentrum "De Uithof", UTRECHT, 



Netherlands 



a. Analysis of neural and mesodermal competence of the ectoderm with 

 various techniques. Ambystoma mexicanum (Urodela) 



b. Pattern formation in artificially activated ectoderm. Ambystoma puncta- 

 turn, A. mexicanum, Rana pipiens (Amphibia) 



c. Analysis of pattern formation in the prosencephalic portion of the neural 

 plate in normal development. Triturus spp. (Urodela) 



NIGON, V. Dr.es Sci., Prof. — Lab. de Zool. exper., Fac. des Sci. de Lyon, 

 43 Bd. de l'Hippodrome, VILLEURBANNE, France 

 a. Metabolisme des acides nucleiques durant la gametogenese et le deve- 

 loppement. Parascaris equorum (Nematoda), Drosophila melanogaster 

 ( Diptera) , Bombyx mod, Galleria mellonella (Lepidoptera) , Avbacia lixula 

 (Echinoidea) 



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