TRINKAUS, J. P. M.A., Ph. D. — Osborn Zool. Lab., Yale Univ.. NEW 



HAVEN 11, Conn., U.S.A. 

 TRUSLOVE, Miss G. M. B.Sc, Ph.D. — Dept of Genetics. Univ. Coll. 



London. Gower St, LONDON W.C. 1, England (U.K.) 

 a. Developmental genetics of skeletal mutants. Mas musculus (Rodentia) 

 TSCHUMI, P. A. Dr — Anat. School, Univ. of Cambridge, CAMBRIDGE, 



England (U.K.) 

 a. The mode of growth of hindhmb buds and the role which the epidermis 



plays in it. Xenopus laevis (Anura) 

 TUCKER, R. D.V.M. — Dept of Vet. Anat. and Parasitol.. School of Vet. 



Sci.. Univ. of Queensland. Fairfield Rd, Yeerongpilly, BRISBANE, 



Queensland. Australia 



a. Crinogenesis of the salivary glands. Gallus domesticus, Cavia cobaya. 

 Bos taurus (Amniota) 



b. Histogenesis of the digestive tract. Bos taurus (Artiodactyla) 



TUFT. P. H. M.A., Ph.D. — Dept of Zool.. Univ. of Edinburgh, West 

 Mains Rd. EDINBURGH 9. Scotland (U.K.) 

 a. Embryonic growth: cell number, mass, density. Rodnius (Hemiptera) , 

 Brachydanio redo (Teleostei), Xenopus (Anura) 

 TUNG. T. C. F.I.I.E., Dr, Prof. — Lab. of Developm. Physiol, Inst, of 

 . Exper. Biol.. Acad. Sinica. 865 Chang Ning Rd, SHANGHAI 

 — Marine Biol. Lab., TSINGTWO. China 

 TURNER. C. J. B.Sc. — Anat. Dept, London Hosp. Med. Coll., Turner St, 

 LONDON E. 1, England (U.K.) 



a. Histochemistry of early embryonic stages. (Mammalia) 



b. Physiological changes in vagina and cervix. (Mammalia) 



c. Pathological development of foetal gonad. (Mammalia) 



TWITTY. V. C. F.I. I.E.. Dr, Prof. — Dept of Biol. Sci., Stanford Univ., 



STANFORD, Cal., U.S.A. 

 TYLER A. F.I.I.E., Ph.D., Prof. — Dept of Embryol., Div. of Biol., Cahf. 



Inst, of Technol., PASADENA 4. Cal., U.S.A. 



a. Physiology of fertihzation. (Echinoidea) 



b. Physiology of early development. (Echinoidea and Polychaeta) 



c. Life-span, motility and metaboHsm of spermatozoa. (Echinodermata, An- 

 nelida, Mollusca, Aves and Mammalia) 



d. Immuno-embryology. (Echinodermata etc.) 



UBBELS, Miss G. A. B.Sc. — Hubrecht Lab., Internat. Embryol. Inst., 



Janskerkhof 2, UTRECHT, Holland 

 a. Regional differentiation of artificially activated ectoderm. Ambystoma 



mexicanum (Urodela) 

 UBISCH, L. V. F.I. I.E., Dr jur. et phil.. Prof. (Emer.) — PARADIS, Norge 



(no embryological work in progress) 

 ULRICH H. Dr Phil., Prof. — Zool. Inst, der Univ. Gottingen. Mathem.. 



Naturw. Fak.. Bahnhofstr. 28. GoTTINGEN, Deutschland 

 a. Strahlenwirkung in der Embryologie. Drosophila melanogaster (Diptera) 

 URBANI, E. Lib.Doc. — 1st. di Anat. comp. dell'Univ., Fac. di Sci., Via 



Borelh 50, ROMA, Italia 



a. Azione degU antimitotici sul metabohsmo respiratorio. (Amphibia) 



b. Ricerche sui determinanti germinah. (Insecta) 



c. Ricerche sull'acido ribonucleico delle fasce vitellogene e dei nuclei vitel- 

 lini. (Echinodermata, Arachnoidea, Myriopoda and Mammalia) 



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