Thomson 



90 Tracy 



THOMSON FLYNN. T. F.I. I.E.. Dr. Prof. — Fac. of Sci., Queens Univ., 



BELFAST. Ulster. Eire (U.K.) 



(no data received) 

 THURMOND. W. A.B.. M.A. — Dept of Zool.. Univ. of California, 



BERKELEY 4. Cal.. U.S.A. 



(no data received over some years) 

 TOIVONEN. S. I. F.I.I.E.. Ph.D., Prof. — Zool. Lab., Univ. of Helsinki. 



Dept of Physiol.. P. Rautatiekatu 13. HELSINKI, Finland 



a. The specific action of heterogenous inductors. Triton (Urodela) 



b. Analysis of the regulative potencies of the invaginating archenteron 

 roof and of the induced neural plate along the dorsoventral and cranio- 

 caudal axes by heteroplastic transplantation of parts of the dorsal 

 blastoporal lip. Triturus alpcstris. taeniatus and cristatus (Urodela) (in 

 collaboration with P. D. NIEUWKOOP, Utrecht) 



c. Thyroid gland and adenohypophysis in delayed metamorphosis. Xenopus 

 laeris (Anura) 



d. The development of mouth- and pharyngeal cavity. Xenopus laevis 

 (Anura) (Normal Table) 



e. Induction of bone cells by chemical agents in the adult animal. Lepus 

 cuniculus (Lagomorpha) 



f. Induction of mesoderm by killed inductors. Triturus (Urodela) 

 TOLMAN, R. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind.. 



U.S.A. 

 a. Biochemical and immunochemical analysis of the synthesis and distribu- 

 tion of the contractile proteins, actin and myosin, in the development 

 of the heart in the early embryo. Gallus gallus (Aves) (in collaboration 

 with J. D. EBERT) 

 TONDURY. G. F.I.I. E. Prof. — Anat. Inst, der Univ., Gloriastr 19. 

 ZORICH.Schweiz 



a. Ueber Viruswirkung auf die Embryonalentwicklung. 



b. Untersuchungen iiber Wachstum und Differenzierung fetaler Organe. 



c. Wachstum und Differenzierung embryonaler Organe in vitro unter 

 verschiedenen experimentellen Bedingungen. 



d. Weitere Untersuchungen iiber die Wirkung weiblicher Sexualhormone 

 auf spatere Entwicklungsstadien. Triton (Urodela) 



TORREY. T. W. Prof. — Dept of Zool.. Indiana Univ., BLOOMING- 

 TON. Ind.. U.S.A. 



a. Histochemical and experimental analysis of the development of the uro- 

 genital system. Mus rattus (Rodentia) 



b. Descriptive study of the early development of the nephros. Homo 

 (Primates) 



TOSI. Miss L. Dott. Sci. Biol. — Zool. Station. NAPLES. Italy 



(no data received on Nov. 1", 1953) 

 TRACY. H. C. Ph.D.. Prof. (Emer.) — Dept of Anat.. Med. School, Univ. 

 of Kansas. LAWRENCE. Kansas. U.S.A. 



a. The development of all systems in relationship to behaviour. Opsanui 

 tau (Pisces) (in collaboration with J. WINBLAD and Th. BATTY) 



b. Development of the nervous system in relation to behaviour. Op>;inus 

 tau (Pisces) 



c. Physiological stages in development. Opsanus tau (Pisces) 



