c. Influence des hormones sur le developpement foetal. Rattus spec. (Ro- 

 de ntia) 



d. Influence des alcaloides du Rauwolfia, de la reserpine et de la deserpi- 

 dine, sur le developpement. Rattus spec. (Rodentia) (en collaboration 

 avec Mrs. L. MERCIER (PAROT)) 



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 laevis (Anura) 

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



Exper. Biol., Acad. Sinica, 320 Yo Yang Road, SHANGHAI, China 

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



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



a. Lentoid replacement in adult eyes. Rana pipiens (Anura) 



b. Bipolar regeneration. Saccoglossus Kowalevskii (Ptychoderidae, Ente* 

 ropneusta) 



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

 STANFORD, Cal., 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, Cal., 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.,) 



UBBELS, Miss G. A. M.Sc. — Zool. Lab., State Univ., Janskerkhof 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) (in collab- 

 oration with Chr. P. RAVEN) 



UBISCH, L. v. Dr.jur. et phil., F.I.I.E., Prof. (Emer.) Minister i.W., Prof. 

 (Hon.) Hamburg — PARADIS, Norway 



a. Entwicklung und Metamorphose des Pluteus. Genocidaris maculata, 

 Sphaerechinus granulans (Echinoidea) 



b. Skelettentwicklung. Arhacia lixula (Echinoidea) 



c. Reziproke Bastardplutei. Genocidaris maculata, Paracentrotus lividus 

 resp. Psammechinus microtuberculatus (Echinoidea) 



d. Merogone. (Genocidaris 9 ) Paracentrotus $ resp. Psammechinus $ 

 und vice versa (Echinoidea) 



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



FUKUOKA, Japan 

 a. Studies on reproduction and embryology. (Microchiroptera) 

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



Universitatstr. 2, ZURICH, Schweiz 



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

 logical stages. Drosophila melanogaster (Diptera) 



b. Morphology, physiology and cytology of paedogenetic bisexual reproduc- 

 tion cycle. Oligarces paradoxus, Miastor metraloas, Mycophila nikoleii 

 (Cecidomyidae, Diptera) 



143 



