Lcp'Lil 



a. Study of the effects of thalidomide on embryos and on adult osteogene- 

 sis. Gallus gallus, Columba livia (Aves) 



b. Induction of tumors by methylcholantrene; homo- and heterospecific 

 transplants; tumorigenic activity of acellular extracts and of nucleic 

 acids from these tumors. Triturus ctistatus, Xenopus laevis, Pleurodeles 

 waltlii (Amphibia) 



LEPORI. N. G. Prof. — 1st. di Biol, e Zool. gener., Univ. di Sassari, SAS- 

 SARI, Sardegna, Italia 



a. Research on the origin of the asymmetry of the female gonad (blasto- 

 derm in vitro). (Aves) 



b. Research on the origin of asymmetrical heart development (blastoderm 

 in vitro). Gallus spec, Anas spec. (Aves) 



LESSEPS. R. J.. S. J. B.S.. Ph.D. — Res. Inst, for Nat. Scis., Woodstock 

 College, WOODSTOCK, Md. 21163, U.S.A. 



a. Developmental genetics of cell movements in embryos studied by 

 reaggregation of dissociated cells. Drosophila melanogastet (Diptera) 



b. Electron microscopy of dissociated and reaggregating embryonic cells. 

 Gallus domesticus (Aves) 



I.EUSSINK, J. A. M.Sc. — Hubrecht Lab. (Intern. Embryol. Inst.), p/a 

 Universiteitscentrum "De Uithof", UTRECHT, Netherlands 

 a. Distribution of inductive capacity in the archenteron-roof and in the 

 overlying neural plate (explantation experiments). (Urodela) 



LEVAK (SVAJGER), Mrs. B. D.Sc. — Inst, of Biol., Fac. of Med., ZAG- 

 REB, Salata, Yugoslavia 

 a. Investigation of differentiation of the embryo in the anterior chamber of 

 the eye and in vitro. Rattus norvegicus albinus (Rodentia) (in 

 collaboration with N. SKREB) 



LEVENE, C. M.D., B.Ch., B.A.O. — Anat. Dept., Univ. of the West In- 

 dies. KINGSTON, Jamaica. West Indies 



a. Blood vessels of developing cartilaginous epiphysis; histological and 

 histochemical, and radioisotope study with ^^S and ^H-thymidine. 

 (Mammalia) 



b. Growth of cartilage as exemplified by cricoid cartilage; ^^S and ^H- 

 thymidine study. (Mammalia) 



LEVI. CI. Dr.es Sci., Prof. — Lab. de Biol, gener.. Fac. des Sci. de Stras- 

 bourg, 12 Rue de I'Universite, STRASBOURG, France 

 a. Descriptive and experimental embryology, morphogenesis, cytology 

 (electron microscopy). (Porifera) 



LEVI, G. L. Dr., M.I.I.E., Prof.(Emer.) — c/o 1st. di Anat. umana, Fac. di 

 Med., Corso Massimo d'Azeglio 52. TORINO, Italia 



LEVI-MONTALCINI, Miss R. 'M.D., M.I.I.E. — Dept. of Zool., Washing- 

 ton Univ., ST. LOUIS, Mo. 63130, U.S.A. 



a. Comparative investigation of neurogenesis, flower Vertebrata. Aves, 

 Mammalia) 



b. Study of action of the nerve growth factor and related problems in 

 experimental neurobiology 



LEVIS, A. G. Dr.Biol.Sci. — 1st. di Zool., Anat. comp. e Genet., Fac. di 

 Sci.. Via Loredan 10, PADOVA, Italia 



a. Cell metabolism and multiplication in vitro. Cavia spec, Cricetulus 

 griseus (Rodentia) 



b. Germ cell differentiation in vitro. (Amphibia) 



122 



