Iwa-Kam 



IWASAWA. H. M.Sc. — Biol. Inst., Fac. of Sci., Niigata Univ.. NIIGA- 

 TA, Japan 



a. Effects of steroid hormones on gonad differentiation. (Anura) 



b. Modification of gonad differentiation by means of administration of 

 thiourea. (Anura) 



JACOBS, M. S. Ph.D. — Dept of Histol. and Embryol., Med. School, 

 Queen's Univ.. KINGSTON, Ont.. Canada 

 a. Skin growth, differentiation, transplantation. Mas norvegicus (Rodentia) 

 JACOBSON, A. A.B. — Dept of Biol. Sci.. Stanford Univ., STANFORD. 



Cal., U.S.A. 

 JACOBSON. D. C.-O. Fil.mag. — Zool. Inst.. Uppsala Univ.. UPPSALA, 

 Sweden 

 a. Determination of the central nervous system. Ambystorna (Urodela) 

 JAFFE. L. F. B.S., Ph.D. — Hopkins Marine Station, PACIFIC GROVE. 

 Cal., U.S.A. 



a. Investigation into mechanism whereby near-by eggs or adult determine 

 polarity of egg. Fucus furcatus (Fucales. Algae) 



b. Investigation into conditions producing bipolar embryos. Fucus furcatus 

 (Fucales, Algae) 



JAFFEE, O. C. B.A., M.S., Ph.D. — Dept of Anat., Univ. of Arkansas, 

 School of Med., LITTLE ROCK. Arkansas, U.S.A. 

 a. Investigation on the developmental physiology of the pronephros, using 

 histochemical and respiratory methods. Rana pipiens (Anura) 

 JAGER, B. de M.Sc. — Division of Fisheries, Beach Road, Sea Point, 

 CAPE TOWN, South Africa 

 a. Embryology. Trachurus trachurus Linn. (Percomorphi, Neopterygii) 

 JAGERSTEN.K. G. M. Fil.Dr. Prof. — Zool. Inst.. Uppsala Univ.. UPP- 

 SALA. Sweden 

 a. Larval development. (Polychaeta) 

 JANOSKY. L. A.B. — Dept of Anat.. Med. School. Univ. of Kansas. 

 LAWRENCE, Kansas. U.S.A. 

 a. Histochemical localization of glycogen associated with the central ner- 

 vous system in developmental behaviour. Ambystorna maculatum (Uro- 

 dela) (in collaboration with Mrs E. L. WENGER and P. G. ROOFE) 

 JANSEN. J. M.D. — Anat. Inst.. Univ. of Oslo. OSLO. Norway 



a. Histogenesis of the rhombencephalic nuclei. Balaenoptera physalus 

 (Cetacea) 

 JIT. I. M.B., M.S., Ph.D. — Dept of Anat.. Med. Coll. Amritsar, AMRIT- 

 SAR, Punjab, India 

 a. Histogenesis of vermiform appendix. Homo (Primates) 

 h. Development of the ileo-colic valve and its frenula. Homo (Primates) 



c. Development of the splanchnic nerves. (Homo (Primates) 



d. Prenatal ossification of some bones. Homo (Primates) 



JOHNELS, A. G. Phil. Dr — Zootom. Inst.. Univ. of Stockholm. 116 Drott- 

 ninggatan, STOCKHOLM, Sweden 

 a. Development and morphology of the skeleton of the head. (Dipnoi and 

 Siluridae) 

 jOHNEN, Miss A. G. Dr Phil. — Zool. Inst, der Univ. Koln, Kerpener- 

 strasse 13, KOLN-LINDENTHAL, Deutschland 

 a. Die Wirkungsspezifitat abnormer Induktoren in der Entwicklung. (Am- 

 phibia) 



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