c. Analyse du processus de regulation et de paragenese. (Selachii) (en col- 

 laboration avec Miss D. HAY) 



d. Morphogenese du tractus genital et des gonades. Emys leprosa (Chelo- 

 nia), (Ophidia) (en collaboration avec Miss Y. STEFAN) 



e. Origine de la lignee germinale, morphogenese et differentiation des go- 

 nades. Xiphophorus Helleri, Lebistes reticulatus, Barbus spec. (Teleostei) 

 (en collaboration avec E. FOLLENIUS) 



VOLPE. E. P. Ph.D. — Dept. Zool, Newcomb Coll. of Tulane Univ., NEW 

 ORLEANS 18, Louisiana, U.S.A. 



a. Embryonic temperature adaptations in various species. Bufo americanus, 

 B. terrestris, B. fowled, B. woodhousei, B. valliceps (Anura) 



b. Inheritance of color patterns. Rana pipiens (Anura) 



c. Interspecific hybridization. Bufo terrestris, B. fowled, B. valliceps 

 (Anura) 



d. Descriptions of larvae. Bufo valliceps, B. quercicus, Rana palmipes, R. 

 capito sevosa (Anura) 



VOY, A. Dr. es Sci. — Lab. de Zool., Fac. des Sci., POITIERS, Vienne, 



France 

 WADDINGTON, C. H. Sc.D., F.R.S., F.I. I.E., Prof. — Inst, of Animal 



Genet, Univ. Dept. of Genet., King's Buildings, West Mains Road, 



EDINBURGH 9, Scotland 



a. Metabolism of radio-isotopes. Triturus spec. (Urodela) (in collaboration 

 with J. L. SIRLIN) 



b. Phenocopies. Drosophila spec. (Diptera) 



c. Developmental effects of metabolic antagonists. (Evertebrata, Verte- 

 brata) (in collaboration with Miss M. M. PERRY) 



d. Electron microscope studies of gene action, (in collaboration with Miss 

 M. M. PERRY) 



e. Study of certain features of developing embryos using electronmicro- 

 graphs. (Diptera), (Amphibia) (in collaboration with G. G. SELMAN 

 and Miss M. M. PERRY) 



WAELSCH, Mrs. S. GLUECKSOHN Ph.D. — Dept. of Anat, Albert Ein- 

 stein Coll. of Med., Eastchester Road, NEW YORK 61, N.Y., U.S.A. 



a. Developmental physiology. Mus musculus (Rodentia) 



b. Developmental genetics. Mus musculus (Rodentia) 

 WAGNER, G. Ph.D. — Sonnenrain, Ittigen, BERN, Schweiz 



a. Empfindlichkeit verschiedener Entwicklungsstadien gegen Rontgenstrah- 

 len. (Amphibia) 

 WAIDYASEKARA, L. M.Sc — Dept. of Zool., Presidency Coll., College 

 St., CALCUTTA 12, India 



a. Cellular changes after chemical treatments. Amoeba spec. (Protozoa) 



b. Nucleo-cytoplasmic relationship. Amoeba spec. (Protozoa) (in collabo- 

 ration with. S. MOOKERJEE, Mrs. M. G. ALAMELU, Miss D. MU- 

 KHERJI and J. DUTTA) 



WALKER, B. E. B.Sc, M.Sc, Ph.D. — Dept. of Anat., Med. Branch, Univ. 

 of Texas, GALVESTON, Tex., U.S.A. 



a. Development of the secondary palate. Mus musculus (Rodentia) 



b. Embryology of cortisone induced cleft palate. Mus musculus (Rodentia) 



c. Effects on fetal development of mechanically altering the fetal environ- 

 ment. Mus musculus (Rodentia) 



129 



