b. Continued study of developmental anomalies. Brain. Heart. Mus mus- 

 culus. Homo sapiens (Mammalia) 



c. Continued study of transplacental effects of urethan. Mus musculus 

 (Rodentia) 



d. Developmental pattern and mechanism of iris and ciliary body. Tursiops 

 truncatus, Oryctolagus cuniculus, Mus musculus, Homo sapiens (Mam- 

 malia) 



e. Development of head structure with special attention to cranial nerves, 

 blowhole and ear. Prodelphinius coerulealbus (Cetaceae) 



SINGER M. B.S.. M.A.. Ph.D.. Prof. — Dept. of Zool., Cornell Univ., 

 ITHACA, N.Y., U.S.A. 



a. Introduction of chemicals directly into developing regenerates and tissues 

 by means of a method of microinfusion. Triturus vividescens viridescens 

 (Utodela) 



b. Electron microscopic studies of regenerates. Ambystoma punctatum (Uto- 

 dela) 



c. The induction of regeneration in postmetamorphic animals by increase in 

 nerve number. (Anuva) 



SINGER. R. M.B., Ch.B., F.R.A.I. — Anat. Dept., Med. School, Univ. of 

 Cape Town, MOWBRAY, C.P., South Africa 



SINHA, A. K. M.Sc. — Dept. of Zool., Presidency Coll., College St., CAL- 

 CUTTA 12, India 



a. Determination of regenerative potencies. Hydra spec. (Coelenterata) 



b. Determination and individuation. Hydra spec. (Coelenterata) (in colla- 

 boration with S. MOOKERJEE, S. SANYAL and S. N. NAGARA- 



SIRAKAMI, K. I. M.A., Ph.D. — Biol. Dept., Yamanashi Univ., KOFU, 



Japan 

 SIRLIN, J. L. Dr.Nat.Sci. — Inst, of Animal Genet., Univ. Dept. of Genet., 



King's Buildings, West Mains Road. EDINBURGH 9, Scotland 

 a. Differentiation of protein and nucleic acids in embryonic cells. (Diptera, 



Amphibia, Aves) 

 SKREB, N. M.D., D.Sc. — Inst, de Biol., Fac. de Med., Salata, ZAGREB, 



Yougoslavie 

 SLABY, O. MUDr., RNDr., Dr.Sci., Prof. — Inst, of Histol., and Embryol., 



Fac. of Med., Charles Univ., Karlovarska ul. 48, PLZEN, Czechoslovakia 



a. The development of the skull. (Amniota, including Homo sapiens) 



b. The development of the limbs. (Amniota, including Homo sapiens) 



c. The development of the nasal cavity. (Amniota, including i7omo sapiens) 

 SLADECEK, F. RNDr., C.Sc. — Dept. of Gener. and Exper. Zool., Z,ool 



Inst, of Charles Univ. Vinicna 7, PRAHA II, Czechoslovakia 



a. Induction with haploid inductors in diploid hosts and vice versa. Siredon 

 mexicanum (Urodela) 



b. Transplantation of nuclei and cytoplasmic components. (Amphibia) (in 

 collaboration with A. ROMANOVSKY and J. NEDVlDEK) 



SLIJPER, E. J. Dr., Prof. — Zool. Lab. der Univ., Plantage Doklaan 44, 



AMSTERDAM C, Holland 

 a. The embryonic bloodcirculation (ductus Botalli, ductus Arantn etc.). 



(Cetacea) c 



SLIPKA. J. MUDr., RNDr.. C.Sc. — Inst, of Histol. and Embryol, Fac. or 



Med., Charles Univ., Karlovarska 48, PLZEN, Czechoslovakia 



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