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



Mains Road, EDINBURGH 9, Scotland 

 a. Embryonic growth: cell number, mass, density, uptake and distribution 



of water. Xenopus laeuis (Anura) 

 TUMANISHVILI, G. D. Doct.biol.sci. — Dept. of Biophysics, Inst, of 



Physics, Acad, of Sci. of the Georgian S.S.R., TBILISSI, U.S.S.R. 



a. Intracellular interactions and their role in regulation of tissue growth; 

 the significance of substances released by cells for such interactions. 



b. Chemical nature of intracellular substances promoting and inhibiting cell 

 division and growth. 



TUNG, T. C. Dr., F.I.I.E., Prof. — Inst, of Zool.. Acad. Sinica, PEKING, 



Haitien, China 

 TWEEDELL, K S. B.S., M.S., Ph.D., Prof. — Dept. of Biol., Univ. of Notre 



Dame, NOTRE DAME, Ind., U.S.A. 



a. Role of subcellular particles in differentiation of living marine eggs. 

 Pectinaria gouldii (Polychaeta) 



b. Inhibition of hydranth regeneration. Tubularia crocea (Hydrozoa) 

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



STANFORD, Calif., U.S.A. 

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

 fornia Inst, of Technol., PASADENA 4, Calif., U.S.A. 



a. Physiology of fertilization. (Echinoidea) 



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



c. Life-span, motility and metabolism of spermatozoa. (Annelida; Mollusca; 

 Echinodermata; Aves; Mammalia) 



d. Immuno-embryology. Developmental immunogenetic analysis of cancer. 

 (Echinodermata etc.,) 



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

 The University, READING, England 



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

 mesticus (Aves) 



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



c. Ca and Mg in embryos. Gallus domesticus (Aves) 



UBBELS, Miss G. A. M.Sc. — Zool. Lab., State Univ. of Utrecht, Janskerk- 

 hof 3, UTRECHT, Netherlands 



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

 ovariotestis. Limnaea stagnalis, L. peregra (Gastropoda) 



b. Cytochemistry of oogenesis. Limnaea stagnalis (Gastropoda) 

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



a. Entwicklung und Metamorphose des Pluteus. Genocidaris maculata, 

 Sphaerechinus granulans (Echinoidea) 



b. Skelettentwicklung. Arbacia lixula (Echinoidea) 



c. Reziproke Bastardplutei. Genocidaris maculata, Paracentrotus lividus 

 resp. Psammechinus microtuberculatus (Echinoidea) 



d. Merogone. Genocidaris $, Paracentrotus d" resp. Psammechinus cf 

 und vice versa (Echinoidea) 



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

 FUKUOKA, Japan 

 a. Studies on reproduction and embryology. ( Microchiroptera) 

 ULLMANN, Miss S. L. Ph.D. — Inst, of Animal Genet., Univ. Dept. of 

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



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