Legr 55 Lever 



a. Determination du sexe. (Oniscoidea et Cymothoidea, Isopoda, Crusta^ 

 cea) 



b. Developpement des coaptations. (Oniscoidea, Isopoda; Decapoda, Crus~ 

 tacea), (Insecta) 



c. Etude de la croissance. Porcellio dilatatus Brandt (Oniscoidea. Isopoda, 

 Crustacea) et Anilocra physodes L. (Cymothoidea, Isopoda, Crustacea) 



LEHMAN, H. E. M.A., Ph.D., Prof. — Dept of Zool., Univ. of North 



Carohna, CHAPEL HILL, N.C., U.S.A. 

 a. Studies on the behaviour, differentiation and metabohsm of pigment 



cells as related to the establishment of specific pigment patterns of larvae 



and adults. Amblystoma and Triturus (Urodela) 

 h. Studies on the relation of external media and physical surfaces on the 



migration an differentiation of tissues in vitro. Amblystoma and 



Triturus (Urodela) 

 LEHMANN, ¥. E. Dr Phil., Prof. — Abt. fur Zoophysiol., Zool. Inst, der 



Univ.. Sahlistr. 8, BERN. Schweiz. 



a. Allometrisches Wachstum. (Amphibia) (in Zusammenarbeit mit diver- 

 sen Mitarbeitern) 



b. The influence of chloramine-compounds on early development (neuru- 

 lation and embryo-formation). Triturus alpestris and Triturus taeniatus 

 (Urodela) (in collaboration with P. D. NIEUWKOOP) 



c. Schwanzregeneration, normal und chemisch beeinflusst. Xenopus (Anura) 



(in Zusammenarbeit mit diversen Mitarbeitern) 



d. Elektronenmikroskopische Struktur von tierischen Eiern. (Echinoder- 

 mata, Ascidiae und Tubifex) 



e. Regeneration (Bedeutung der I-Zellen). (Hydrozoa, Coelenterata) (in 

 Zusammenarbeit mit P. TARDENT) 



f. Erzeugung von Teratomen bei larven. Xenopus (Anura) 

 LELIeVRE, a. Anc. Chef de Travaux — Lab. d'Embryol.. Fac. de Med.. 



15 Rue Ecole de Med.. PARIS Vie. France, 

 a. Etude des anomahes de divers types. Homo (Primates) 

 LENDER. Th. Prof. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. 

 et Teratol. exper. du C.N.R.S.. Institut de Zool. et de Biol, generale, 

 12 Rue de I'Universite, STRASBOURG. France, 

 a. Regeneration des yeux. Role du systeme nerveux dans la regeneration 

 des yeux. Polycelis nigra (Tricladidea, Turbellaria) 

 LEONE. V. M.D. — 1st. di Zool. e Anat. comp.. Via Celoria 10. MILANO. 

 Italia, (from 1st. di Anat. umana norm. dell'Univ. di PALERMO) 



a. NaSCN action on embryonic development. (Amphibia and Aves) 



b. Urea action on embryonic development. (Amphibia) 



LEPORI, N. G. Lib.Doc. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. 



Volta 4. PISA. Italia, 

 a. Ovo- and spermatogenesis — gynogenetic development — polyploidy 



— chromosome cycle. Polycelis nigra (Tricladidea, Turbellaria) 

 h. Ovo- and spermatogenesis — chromosome cycle. Polycelis tenuis (Tri- 



cladidea, Turbellaria) 



c. Ovo- and spermatogenesis — chromosome cycle. Helix adspersa (Gas- 

 tropoda) 



LEVER. ]. Dr Phil. — Zool. Inst.. Free Calvinistic Univ., Rapenburgerstr. 

 128, AMSTERDAM C, Holland, 

 a. Descriptive embryology. Colisa labiosa (Teleostei) 



