Leghissa 54 Lesh 



e. Regeneration of peripheric nerves. Homo (Mammals) 



f. Action of vitamins (A, B group, C) on the histophysiology of endocrine 

 glands during metamorphosis of Amphibians. Rana 



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

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



a. Studies on the behavior, differentiation, and metabolism of Amphibian 

 pigment cells as related to the establishment of specific pigment patterns 

 of larvae and adults. Amblystoma and Triturus 



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

 migration and differentiation of Amphibian tissues in vitro. Amblystoma 

 and Triturus 



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

 Univ., Sahlistr. 8, BERN, Schweiz. 



a. Allometrisches Wachstum bei Amphibien. (in Zusammenarbeit mit 

 diversen Mitarbeitern) 



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

 lation and embryo- formation) of the Amphibian egg. Triturus alpestris 

 and Tr. taeniatus (in collaboration with P. D. NIEUWKOOP) 



c. Schwanzregeneration von Xenopus, normal und chemisch beeinflusst. 

 (Amphibia) (in Zusammenarbeit mit diversen Mitarbeitern) 



d. Elektronenmikroskopische Struktur von tierischen Eiern (Echinodermen, 

 Ascidien und Tubifex) 



e. Regeneration bei Coelenteraten. Hydrozoa (Bedeutung der I-Zellen) 

 (in Zusammenarbeit mit P. TARDENT) 



f. Erzeugung von Teratomen bei Xenopus-larven. (Amphibia) 

 LELIfiVRE, A. — Lab. d'Embryol., Fac. de Med., 15, Rue Ecole de Med., 



PARIS Vie, France, 

 a. Etude des anomalies de divers types. Homo (Mammalia) 

 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 l'Universite, STRASBOURG, France, 

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

 des yeux des Planaires. Polycelis nigra (Turbellaries) 

 LEONE, V. Dr — 1st. di Zool. e Anat. comp., Via Celoria 10, MILANO, 

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

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

 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 

 — chromose cycle. Polycelis nigra (Turbellaria) 

 LESHER, S. Ph.D. — Dept of Anat., Univ. of Kansas, Med. School, 

 LAWRENCE, Kan., U.S.A. 



a. The nucleic acids (RNA, DNA) their localization and relative con- 

 centration in the larval salivary gland of Drosophila robusta during the 

 course of larval development. (With special emphasis on the interrelation 

 of the two nucleic acids and the role of the nuclear components in their 

 metabolism). (Insecta, Diptera) 



b. A survey of the enzyme systems concerned in the embryonic develop- 

 ment of the amphibian nervous system. (Emphasis will be on the time 

 of appearance of the various enzyme systems, their localizations and 

 their concentrations). Amblystoma 



