Nei 91 Nieuwkoop 



NEIGER, M. Developpement du noyau tangentiel du nerf vestibulaire 

 — son origine. Poissons, Batraciens, Reptiles et Oiseaux. II. 9. V. 

 (en collaboration avec A. MICHELI) 



NELSEN, O. E. The cumulative of oxygen-pressure and the production 

 of various degrees of blocking of the processes of gastrulation in 

 the embryo of the frog, Rana pipiens. IHb. 6. d. J. 



NEWELL, G. E. Breeding habits, embryology and larval life-history 

 of Arenicola marina and Clymenella torquata (Polychaetes). 

 (completion of previous work published in: J. Mar. Biol. Assc. 1948) I- 2a. C 



NEWHALL, C. A. Anatomical findings in congenital anomaly of the 

 heart and great vessels together with discussion of the more in- 

 teresting features involved. Homo. Hid. 4. M. 



NEWTH, D. R. An attempt to determine the origin of the trabeculae 

 cranii and the branchial skeleton of Lampetra planed (Cyclosto- 

 mata). Ilia. 11. I. 



The study of the normal development of the cornea of the eye 



in an amphibian. Xenopus laevis. I. 10. J. 



NEWTON, B. L. Continued investigation by homologous and hetero- 

 logous transplantation of embryonic material relating to its develop- 

 ment in the anterior chamber in the eye using the method developed 

 by H. S. N. GREENE. Material from human fetuses as well as 

 guinea pigs and mouse embryos will be used. Ilia. 2b**. M. 



NICHOLAS, J. S. Studies on the rat egg. Mus notvegicus. Ilia. 2a. M. 



The development of rat muscle. Mus norvegicus. Ilia. 12. M. 



The development of actomyosin in developing rat muscle. Mus 



norvegicus. 111b. 12. c. M. 



The interaction of the. roof of the archenteron upon the nervous 



system. Amblystoma mexicanum. \\\a. 7. J. 



NICOLA, M. de Calcium distribution in early development of sea 

 urchin eggs. Pavacentrotus and Arbacia. Illb. 2c. c. G. 



Phosphatase distribution in Crustacean eggs. Cymothoids and 



Asellus (Crust, hop.). Illb. 2c. c. D. 



NIEUWKOOP, P. D. The influence of Li on the primitive develop- 

 ment of the Ascidian egg for analysing the potencies of regulation 

 in this "mosaic" egg. Ascidia malaca. Ilia. lc. H. 



The influence of Li on respiration and metabolism of the Ascidian 



egg. Ascidia malaca. Illb. 2a. a. H. 



The influence of chloramine-compounds on the early development 



(neurulation and formation of the central nervous system) of the 

 Amphibian egg. Triturus alpestris and TV. taeniatus. Ilia. 2a. e. J. 

 (in collaboration with F. E. LEHMANN) 



Normal development of Xenopus laevis, especially gastrulation and 



neurulation (for a normal table of Xenopus laevis). 1.6. J. 



(in collaboration with P. F. FLORSCHQTZ) 



Analysis of the regulative potencies of the invaginating archenteron 



roof and the induced neural plate along the dorso-ventral and 

 cranio-caudal axes in the Amphibian egg by heteroplastic trans- 

 plantation of parts of the dorsal blastoporal lip. Triturus alpestris, 

 taeniatus and cristatus. (in collaboration with S. TOIVONEN) Ilia. lc. J. 



