a. Cytochemical investigation on development. (Teleostei) (in collaboration 

 with Y. KANOH) 

 YAMANA, K. M.Sc. D.Sc. — Dept. of Biol., Fac. of Sci., Kyushu Univ., 

 FUKUOKA, Japan 

 a. Two kinds of RNA in embryos and cancer tissues. (Amphibia; Mam- 

 malia) 

 YANAGIMACHI, R. Ph.D. — Worcester Foundation for Exp. Biol., 222 

 Maple Avenue, SHREWSBURY, Mass., U.S.A. 



a. Ovulation, fertilization. Mesocricetus auratus (Rodentia) 



b. Sex determination. Pettogasterella gracilis, Sacculina senta (Rhizocepha- 



YANAGISAWA, T. — Embryol. Section, Dept. of Biol., Fac. of Sci., Tokyo 

 Metropolitan Univ., Setagaya-ku, TOKYO, Japan 



a. Phosphate metabolism during embryogenesis. ( Echinodermata) 



b. Distribution of phosphagens and guanidine phosphoryl transferases in 

 adults and gametes. (Echinodermata) 



YNTEMA, C. L. Ph.D., F.I. I.E., Prof. — Dept. of Anat, School of Med., 

 State Univ. of New York, 766 Irving Ave., SYRACUSE 10, N.Y., 

 U.S.A. 



a. Induction and differentiation of ear ectoderm. Ambystoma punctatum 

 (Urodela) 



b. Regeneration of aneural limbs. Ambystoma punctatum (Urodela) 



c. Development of the visceral skeleton. Gallus domesticus (Aves) (in col- 

 laboration with W. S. HAMMOND) 



d. Stages in embryonic development. Chelydra serpentina (Chelonia) 

 YONEDA, M. — Embryol. Section, Dept. of Biol., Fac. of Sci., Tokyo Me- 

 tropolitan Univ., Setagaya-ku, TOKYO, Japan 



a. Mechanical properties of egg cells during cleavage. (Echinodermata) 

 YOSHIKURA, M. D.Sc. — Dept. of Biol., Fac. of Sci., Kumamoto Univ., 

 Kurokami-machi, KUMAMOTO-Shi, Japan 



a. Comparative embryology. (Araneae, Arachnoidea) 



b. The role of the pituitary in the differentiation of the gonad. (Amphibia) 



c. The influence of high temperature on the differentiation of the gonads in 

 hypophysectomized tadpoles. Rana japonica (Anura) 



YOUNG, B. A. M.B., B.S. — Anat. Dept., London Hosp. Med. Coll., Turner 



St., LONDON E. I, England 

 a. Fine structure of foetal thyroid. Homo sapiens (Primates) 

 YOUNG, W. C. Ph.D., Prof. — Dept. of Anat., Med. School, Univ. of 



Kansas, LAWRENCE, Kansas, U.S.A. 



a. Reproduction as influenced by hypothyroidism and hyperthyroidism in 

 both males and females. Cavia porcellus (Rodentia) 



b. Sexual behaviour in the male. Cavia porcellus (Rodentia) 



YOW, F. W. B.S., M.S., Ph.D. — Kenyon College, GAMBIER, Ohio, 

 U.S.A. 



a. Effects of ultraviolet radiation upon morphogenesis. Euplotes eurystomus 

 (Ciliata) 



b. Effects of different nutrient materials upon sensitivity to ultraviolet 

 radiation. Euplotes eurystomus (Ciliata) 



c. Analysis of effects of specific inhibitors of nucleic acid synthesis upon 

 morphogenesis. Euplotes eurystomus (Ciliata) 



155 



