VANNINI, E. Dr., Prof. — Inst, of Zool., Fac. of Sci., Univ. of Bologna, Via S.Giacomo 9, 



40126 BOLOGNA, Italy 

 a Experimental analysis of the development of the gonad and Bidder's organ. Bufo spec. 



(Anura) 

 b Inhibition by antibiotics of testosterone-induced sex-reversal in tadpoles. Rana dalmatina 



(Anura) 

 c General study of the problem of the "sex gradient" in various hermaphroditic animals. 



(Hydroidea; Tricladidea, Turbellaria; Serpulidae, Polychaeta) 

 VAN STONE, J. M. Ph.D., Prof. — Dept. of Biol., Trinity Coll., HARTFORD, Conn. 



06106. U.S.A. 

 a The influence of thyroxine upon the regenerative capacity of the tadpole hindlimb. Rana 



sylvatica (Anura) 

 VANZULLI, Mrs. A. M.D. — Sect, of Exper. Neurol., Inst, of Neurol., Hosp. de Clinicas, 



Piso 2, MONTEVIDEO, Uruguay 

 a Sensory evoked potentials in adults, fetus, and newborn. Homo sapiens (Primates) 

 VARMA, H. C. Ph.D., Prof. — Dept. of Anat., Motilal Nehru Med. Coll., Univ. of Allahabad, 



ALLAHABAD- 1, India 

 a Mechanism of transport of substances across the chorio-amnion. Rattus norvegicus 



(Rodentia), Oryctolagus cuniculus (Lagomocpha) 

 b Role of endometrium and extraplacental membranes in feto-maternal exchange processes. 



Homo sapiens (Primates) (with R. BAVEJA) 

 c Histochemistry and cytochemistry of the decidua parietalis and capsularis. Same species 



as b 

 d Chromosomal abnormalities in abortions and congenital anomalies. Same species as b 

 VARON, S. S. M.D., Prof. — Dept. of Biol., Univ. of California, San Diego, P.O.Box 109, 



LA JOLLA, Calif. 92037, U.S.A. 

 a I n v i t r o differentiation of nerve tissue. Gallus domesticus (Aves) and others 

 b Growth- and differentiation-promoting agents from the submaxillary gland. Mus musculus 



(Rodentia) 

 VASSE, J. Lic.es Sci. — Serv. d'Embryol. Exper., Inst. Pasteur, 20 rue des Moulins, 95 



SANNOIS, France 

 a Relationship between the somites and the primordia of the forelimbs. Testudo spec. 



(Chelonia) , Lacerta spec. (Lacertilia) 

 b RNA, DNA, and protein synthesis of epidermal and mesodermal cells in the limb buds. 



(Chelonia), Anguis [ragilis, Lacerta viridis (Lacertilia) (with A. RAYNAUD) 

 c Effects of x-rays on embryonic development. Lacerta viridis (Lacertilia) (with CI. PIEAU) 

 d Effects of metabolic inhibitors on embryonic development. (Reptilia) 

 VASSETZKY, S. G. Cand.biol.sci. — Inst, of Developm. Biol., Acad, of Sci. of the U.S.S.R., 



Vavilov St. 26, MOSCOW 117133, U.S.S.R. 

 a Dynamics of meiosis and mitosis in eggs. Osrrea gigas (Lamellibranchia) , Strongy- 



locentrotus drobachiensis, S. intermedius (Echinoidea) 

 b Production of diploid gynogenesis by means of heat treatment of oocytes at the first 



maturation division and of chemical treatment (with nitrogen mustard) of sperm. Acipensec 



guldenstadti, A. stellatus (Chondrostei) 

 VAUGHN, J. E. Ph.D. — Div. of Neurosci., City of Hope Med. Center, 1500 E. Duarte 



Road. DUARTE, Calif. 91010, U.S.A. 

 a Development of neuroglial cells in the central nervous system (electron microscopy and 



autoradiography). Rattus domesticus (Rodentia) 

 b Electron microscopy of spinal cord development. Rattus domesticus, Mus musculus (Roden- 

 tia) 

 VENEZIANO, P. P. Ph.D., Prof. — Dept. of Biol., Wilbur Wright Coll., 3400 N.Austin 



Ave., CHICAGO, 111. 60634, U.S.A. 



— Dept. of Histol., Loyola Dental School, CHICAGO, 111., U.S.A. 

 a The effect of artificial sweetners on growth and development. Gallus domesticus (Aves) 

 b The effect of antipituitary sera on development. Same species as a 

 c The effect of low intensity magnetic fields on the developing nervous system of 24, 36, and 



48 hour blastoderms. Same species as a 

 VENZKE, W. G. Ph.D., Prof. — Dept. of Vet. Anat., Coll. of Vet. Med., Ohio State Univ., 



1900 Coffey Rd., COLUMBUS, Ohio 43210, U.S.A. 

 a Morphogenesis and physiology of ultimobranchial gland, pineal gland, and blood (Aves) 

 b Experimental morphology of pineal gland. (Bovidae, Artiodactyla) 

 VERBICKY, M. Sh. Cand.med.sci. — Inst, of Human Morphol., Acad, of Med. Sci. of the 



U.S.S.R., Baltiyskaya St. 8, MOSCOW 125315, U.S.S.R. 

 a Immunological relationships between mother and foetus. Rattus norvegicus (Rodentia), 



Papio hamadrys, Macaca mulatta, Homo sapiens (Primates) 

 b Humoral interactions between analogous organs (reticuloendothelial and leucopoietic 



system) of mother and foetus. Rattus norvegicus (Rodentia), Macaca mulatta (Primates) 

 VERDONK, N. H. Ph.D. — Zool. Lab., State Univ. of Utrecht, Janskerkhof 3, UTRECHT, 



Netherlands 



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