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a. Histochemical investigation of early neural notochordal and related tissues.<br />
Gallus gallus (Aves)<br />
LEBLOND, C. P. M.D.. Ph.D., Prof.<br />
MONTREAL, Quebec, Canada<br />
— Dept of Anat., McGill Univ..<br />
a.<br />
b.<br />
Development of the thyroid gland. (Vertebrata)<br />
The development of bones and teeth as shown on radioautographs with<br />
the help of radio-carbon-containing substances. (Vertebrata)<br />
LECAMP, M. — Lab. d'Evolution des Etres organises, Fac. des Sci. de<br />
Paris, 105 Boulevard Raspail, PARIS Vie, France<br />
LEEUWENBERG, A. J. M. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof<br />
3, UTRECHT, Holland<br />
a. Influence of various kations on development. Limnaea stagnalis (Gastropoda)<br />
(in collaboration with W. L. M. GEILENKIRCHEN and<br />
Chr. P. RAVEN)<br />
LEFEBVRES—BOISSELOT, Mrs J. Dr es Sci. — Lab. d'Embryol., Fac.<br />
de Med., 45 Rue des Sts Peres, PARIS Vie, France<br />
a. Teratogenese par carence en vitamines B. Mas rattus (Rodentia)<br />
b. Developpement anormal de I'encephale. Mus rattus (Rodentia)<br />
c. Developpement du bee de lievre. Mus rattus (Rodentia)<br />
LEGHISSA, S. Ph.D. — Lab. di Istol. ed Embriol., 1st. di Anat. Comp.,<br />
Via Belmeloro 8, BOLOGNA (103), Italia<br />
a. Study of egg-cortex. Fusion of blastomeres. (Ascidiae, Urochordata)<br />
b. Differentiation and morphology of nervous tissue. (Coelenterata)<br />
c. Comparative neurology. (Vertebrata)<br />
d. Effects of antimitotics on regeneration of peripheral nerves and on metamorphosis.<br />
Rana, Bufo (Anura) (in collaboration with P. PASQUINI)<br />
e. Regeneration of peripheric nerves. (Vertebrata)<br />
f. Action of vitamins (A, B group, C) on the histophysiology of endocrine<br />
glands during metamorphosis. Rana (Anura)<br />
LEGRAND. J.-J. Dr es Sci., Prof. — Lab. de Zool..<br />
TIERS, Vienne. France<br />
Fac. des Sci.. POIa.<br />
Determination et differenciation du sexe, castrations, greffes, correlations<br />
humorales.<br />
Crustacea)<br />
Etude genetique de la monogenie. (Oniscoidea, Isopoda,<br />
b. Developpement des coaptations. (Oniscoidea, Isopoda; Decapoda, Crus-<br />
tacea), (Insecta)<br />
c. Etude de la croissance. (Oniscoidea, Isopoda, Crustacea)<br />
d. Modalites de la reproduction. Platyarthrus schoblii (Oniscoidea, Isopoda)<br />
e. Analyse biometrique des populations de deux especes soeurs dans le nord<br />
et le midi de la France. Philoscia muscorum Scopoli and P. affinis Verhoeff<br />
(Oniscoidea, Isopoda, Crustacea)<br />
LEHMAN, H. E. M.A., Ph.D. — Dept of Zool., Univ. of North Carolina.<br />
CHAPEL HILL, N.C., U.S.A.<br />
a. Studies on the behaviour, differentiation and metabolism of pigment cells<br />
as related to the establishment of specific pigment patterns of larvae and<br />
adults. Ambystoma and Triturus (Urodela)<br />
b. Studies on the relation of external media and physical surfaces on the<br />
migration and differentiation of tissues in vitro. Ambystoma and<br />
Triturus (Urodela)<br />
c. Transplantation of blastula nuclei into enucleated, uncleaved eggs. Triton<br />
(Urodela)<br />
61
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