e. Development of acidphosphatase. (Amphibia), Mus norvegicus (Roden- 

 tia) 



f. Centrifugation and transplantation of eggs. Mus norvegicus (Rodentia) 



g. Culture of eggs and embryos. Mus norvegicus (Rodentia) 



h. Heteroplastic grafting. Gallus gallus (Aves) (host), Mus norvegicus 



(Rodentia) (donor) 

 j. Coelomic studies of differentiation. Mus norvegicus (Rodentia) 

 k. Study of the forces engaged in cleavage. 

 NIESSING. K. Dr.Med.. o.Prof. — Anat. Inst, der Univ., Robert Kochstr. 6, 

 MARBURG/Lahn. Deutschland 

 (no embryological work in progress) 

 NIEUWENHUYS. R. — Netherlands Central Inst, for Brain Research, Mau- 

 ritskade 59B, AMSTERDAM O., Holland 

 a. Ontogenesis of the cerebrum. (Teleostei) 

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

 Embryol. Inst., Janskerkhof 2, UTRECHT, Holland 



a. Analysis of the neural competence of the ectoderm with various tech- 

 niques. Ambystoma mexicanum (Urodela) 



b. Qualitative and quantitative analysis of the propagation of inductive 

 actions through competent ectoderm, a.o. with time lapse micro-photo- 

 graphy. Ambystoma mexicanum (Urodela) 



NIIZIMA, M. M.D.. Ph.D. — Dept. of Anat., Tokyo Med. & Dental Univ., 

 Yushima 3, Bunkyo-ku, TOKYO, Japan 



a. Tissue culture studies on metamorphosis. Rana catesbiana (Anura) 



b. Tissue culture studies on the development and differentiation of dental 

 tissues. Rattus norvegicus albus, Homo sapies, Felis domestica (Mam- 

 malia) 



c. Tissue culture studies on the functional morphology of the hepatic cells. 

 Gallus domesticus (Aves), Homo sapiens (Primates) 



NIJENHUIS. E. D. M.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, 

 UTRECHT, Holland 



a. Analysis of the phase specificity in the sensitivity of the egg to Li-ions. 

 Limnaea stagnalis (Gastropoda) 



b. Autoradiographic localization of kations in eggs. Limnaea stagnalis 

 (Gastropoda) 



c. Time course of mitotic processes during early cleavage stages. Limnaea 

 stagnalis (Gastropoda) 



d. Influence of lithium on mitosis and cleavage. Limnaea stagnalis (Gas- 

 tropoda) (in collaboration with W. L. M. GEILENKIRCHEN and Chr. 

 P. RAVEN) 



NISHIITSUTSUJI (UWO). Mrs. J. — Lab. of Embryol. and Exper. Mor- 

 phol.. Zool. Inst., Dept. of Sci., Kyoto Univ., KYOTO, Japan 

 a. Hormonal mechanism of metamorphosis. Bombyx mod, Luehdorfia japo- 

 nica, Philosamia cynthia ricini (Lepidoptera) (in collaboration with M. 

 ICHIKAWA) 

 NISHIMURA, H. M.D. — Dept. of Anat., Kyoto Univ., Sakyo-ku, 

 KYOTO, Japan 

 a. Experimental teratology. Mus musculus, Meriones unguiculatus (Ro- 

 dentia) 

 NISSEN, Th. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kiinst- 

 lergasse 16, ZURICH 6, Schweiz 



91 



