Tyl-Van 



TYLER, C. D.Sc, Ph.D., F.R.I. C. Prof. — Dept. of Physiol. Chem., the 

 Univ., READING, England 



a. Formation of the egg shell and its membranes in the oviduct. Gallus 

 domesticus (Aves) 



b. Structure and properties of the egg shell, (Aves) 



UBBELS, Miss G. A. M.Sc. — Hubrecht Lab. (Intem.Embryol.Inst.), p/a 

 Universiteitscentrum ,,De Uithof", UTRECHT, Netherlands 

 a. The role played by the follicle cells around the growing oocyte in the 



ovariotestis. Limnaea stagnalis, L. peregra (Gastropoda) 

 h. Cytochemistry of oogenesis. Limnaea stagnalis (Gastropoda) 



c. Histochemical analysis of neural and mesodermal competence of the ec- 

 toderm. Amby stoma mexicanam (Uvodela) (in collaboration with P. D. 

 NIEUWKOOP) 



t UBISCH. L. V. Dr.jur.et phil., M.I.I.E., Prof. (Emer.) — PARADIS, Nor- 

 (deceased) way 



UCHIDA, T. A. Dr.Agr. — Zool. Lab., Fac. of Agric, Kyushu Univ., 

 FUKUOKA, Japan 

 a. Studies on reproduction and embryology. ( Microchiroptera) 

 UHER, J. M.D., C.Sc. — Clin, of Obstet. and Gynecol., Postgraduate 

 School of Med., nabr. K.Marxe 157, PRAHA-Podoli, Czechoslovakia 

 a. The chorion in tissue culture (biochemistry). Homo sapiens (Primates) 

 ULLMANN, Miss S. L. B.Sc, Ph.D. — Dept. of Zool., Univ. of Edinburgh, 

 West Mains Road. EDINBURGH 9, Scotland 

 a. Comparative ultrastructure of eggs. (Insecta) 

 ULRICH, H. Dr.phil, Prof. — Zool. Inst, der Eidg. Techn. Hochschule, 

 Universitatsstr. 2, ZORICH, Schweiz 

 a. Action of X-rays on nucleus and cytoplasm of eggs, and on embryonic 



stages. Drosophila melanogaster (Diptera) 

 h. Morphology, physiology and cytology of paedogenetic-bisexual repro- 

 duction cycle. Heteropeza pygmaea (= Oligarces paradoxus) , Miastor 

 metraloas (Itanididae = Cecidomyidae, Diptera) 

 URBANI, E. M.I.I.E., Prof. — Lab. di Istol. ed Embriol., Fac. di Scienze, 

 Univ. di Roma. ROMA, Italia 

 a. Biochemistry of embryonic development and of metamorphosis. (Am- 

 phibia) 

 h. Biochemistry of regeneration. (Invertebrata; Vertebrata) 

 c. Cytochemical and autoradiographic investigations of oogenesis. Dytis- 

 cus spec. (Coleoptera) 

 URBANI-MISTRUZZI. Mrs. L. Prof.Inc. — Lab. di Istol. ed Embriol, 

 Fac. di Scienze, Univ. di Roma, ROMA. Itaha 

 a. Biochemistry of regeneration. Tubularia spec. (Hydroidea) 

 URSPRUNG, H. Ph.D., Prof. — Dept. of Biol.. Johns Hopkins Univ., Char- 

 les and 34th Sts., BALTIMORE. Md. 21218, U.S.A. 



a. Biochemical studies on differentiation. Drosophila melanogaster (Dip- 

 tera), Rana pipiens, Xenopus laevis (Anura), Mus musculus (Rodentia) 



b. Organization of imaginal discs. Drosophila melanogaster (Diptera) 



c. Ultrastructure and enzymology of fertilization. Ascidia nigra (Tunicata) 

 UWA, H. M.A. — Biol. Inst.. Fac. of Sci., Nagoya Univ., Chikusa-ku, NA- 



GOYA, Japan 



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