LESTAGE, J. Dr.Biol.Anim. — Lab. de Biol. Anim. A, Univ. Bordeaux I, Av. des Facultes, 



33 TALENCE, France 

 a Etude experimentale de l'influence des facteurs nutritionnels sur la morphogenese du 

 tube digestif et du pancreas. Rana dalmatina, Bufo bufo, Discoglossus pictus (Anura), 

 Triturus helveticus, Salamandra salamandra (Urodela) 

 LETOUR, Mrs. M. M.D. — Lab. d'Anat. et d'Embryol., Fac. de Med., Univ. libre de 



Bruxelles, 97 rue aux Laines, 1000 BRUXELLES, Belgium 

 a Development of cleft lip. Mus musculus (Rodentia) 

 LEVAK (SVAJGER), Mrs. B. D.Sc. —Inst, of Biol., Univ. of Zagreb, Salata 3, 41001 



ZAGREB, Yugoslavia 

 a Early differentiation; transplantation, in vitro culture. Rattus norvegicus (Rodentia) 



(with N. SKREB and A. SVAJGER) 

 b Developmental capacities of tissues of the chorioallantoic membrane. Gallus domesticus 



(Aves) (with N. SKREB and A. SVAJGER) 

 LEVENSON, G. E. Ph.D., D.D.S. — Dept. of Biol., Grad. School of Arts and Sci.; Lab. of 

 Histol. and Embryol., School of Dental Med., Univ. of Pennsylvania, 4001 Spruce St., 

 PHILADELPHIA, Pa. 19104, U.S.A. 

 a Comparison of three types of embryonic cartilage when grown as monolayer cultures. 



Gallus domesticus (Aves) 

 b Effect of ascorbic acid in medium on growth and differentiation of embryonic cartilage in 



monolayer culture. Gallus domesticus (Aves) 

 c Histogenesis of embryonic liver: cell culture techniques, effects of metabolites on 



differentiation. Gallus domesticus (Aves) 

 LEVI, C. Dr.es Sci., Prof. — Lab. de Biol, des Invert. Marins, Museum Natl. d'Hist. Nat., 



57 rue Cuvier, 75 PARIS Ve, France 

 LEVI-MONTALCINI, Miss R. M.D., Prof. — Dept. of Biol., Washington Univ., Skinker 

 and Lindell Ave., ST.LOUIS, Mo. 63130, U.S.A. • 



a Growth control mechanisms in the sympathetic nervous system. 

 b In vivo and in vitro analysis of the nervous system. Peciplaneta americana 



(Blattariae) 

 c A technique to grow nerve and glia cells from explants of brain and ganglia in order to 

 study their growth and differentiation under different experimental conditions. Peciplaneta 

 americana (Blattariae) 

 LEVINSON, H. Z. Ph.D., Prof. — c/o Zool. Inst, der Univ., Siesmayer Str. 70, 6 FRANK- 



FURT/M., W.Germany 

 a Influence of nutrients, especially hormonomimetic substances, on metamorphosis and 



oogenesis. Dermestes spec, Trogoderma spec. (Coleoptera) , Calliphora spec. (Diptera) 

 LEVIS, A. G. Dr.biol.sci. — Inst, of Gen. Biol., Univ. of Padova, Via Loredan 10, 35100 

 PADOVA, Italy ^ t , c 



LEZZI, M. Ph.D. — Lab. for Developm. Biol., Swiss Fed. Inst, of Technol., Sonneggstr. 5, 



8006 ZURICH, Switzerland 

 a Effect of hormones and ions on gene function. Chironomidae (Diptera), Rattus spec. 

 (Rodentia) c _ Q 



LHEUREUX, E. — Serv. de Biol. Anim., Univ. des Sci. et Techn. de Lille, B.P. 3b, Vi 



VILLENEUVE-DASCQ, France 

 a The provocation and development of supernumerary limbs, especially the role of nerves 



and tegument. Pleurodeles waltlii (Urodela) 

 LHOTKA J F. Jr. M.D., Ph.D., Prof. — Dept. of Anat. Sci., Univ. of Oklahoma Med. 



Center, 801 NE 13th St., OKLAHOMA-City, Okla. 73104, U.S.A. 

 a Localization of Ca and Fe in the developing embryo. Gallus domesticus (Aves), bus scrota 



(Artiodactyla) , Homo sapiens (Primates) 

 b Histochemical localizations of polysaccharides in embryo and early fetus, with emphasis 



on vascular system. Homo sapiens (Primates) n rm 



LIANG, H. M. Ph.D., Prof. — « Dept. of Biomorphics, Natl. Defense Med. Center, KU.tfox 



7432, TAIPEI 107, Taiwan, Republ. of China 

 a Development of the pituitary gland. Rana catesbeiana (Anura) ..... ri 



LIERSE, W. Dr.med., Prof. — Abt. fur Neuroanat, Anat. Inst, der Univ., Martinistr. 52, 



2 HAMBURG 20, W.Germany ... 



a Ultrastructure and histochemistry of brain and retina development. (Mammalia) 

 b The biological aspect of neuroblast and glioblast following x-irradiation and hyperbaric 



oxygenation. (Mammalia) 

 c The development of vascularization of the brain. (Mammalia) 



LILIEN J. E. Ph.D. — Dept. of Zool., Univ. of Wisconsin, 1117 W.Johnson bt, 



MADISON, Wis. 53706, U.S.A. „ 



a The turnover of cell surface glycoproteins in relation to developmental changes in cell 



surface structure. . TT . r , , nn^„-;t- 



LIMBORGH, J. van M.D., Prof. — Anat.-Embryol. Inst., Univ. of Amsterdam, Maunts- 



kade 61, AMSTERDAM-O., Netherlands 

 a Sex differentiation. Anas boschas (Aves) 



b Morphogenesis of the skull. Gallus domesticus (Aves) . /n„. mn#M i 



c Development of the harelip condition (descriptive studies). Homo sapiens ( Primates ) ^ 



