a. Morphogenesis and functional development of the parotid gland, i n 

 vivo and in vitro. Ratfus rattus (Rodentia) 



b. Response of embryonic limb-bone rudiments to thyroid hormones i n 

 vitro. Gallus domesticits (Aves) 



LAZARD (HAUBEN). Mrs. L. Lic.es Sci. — Inst. d'Embryol. et Teratol. 

 exper. du C.N.R.S., 49bis Avenue de la Belle Gabrielle. NOGENT sur 

 Marne (Seine), France 



— Lab. d'Embryol. exper. du Coll. de France, 1 1 Place Marcelin 

 Berthelot, PARIS Ve, France 

 a. Limb regeneration, after X-irradiation, and grafts of various tissues and 

 organs. Siredon mexicanum (Urodela) 

 LEACH, Ch. M. B.S., B.Agr.. Ph.D. — Dept. of Botany & Plant Pathol.. 

 Oregon State Univ.. CORVALLIS, Ore. 97331, U.S.A. 

 a. Light-induced sexual and asexual reproduction. (Fungi) 

 LEATHEM. J. H. Ph.D. — Rutgers Univ.. NEW BRUNSWICK, N.J.. 



U.S.A. 

 LEBLOND. C. P. M.D., Ph.D.. Prof. — Dept. of Anat., McGill Univ.. 

 MONTREAL, Quebec, Canada 

 a. Development of the thyroid gland. (Verfebrata) 



h. The development of bones and teeth as shown on radioautographs with 

 the help of radio-carbon-containing substances. (Vertebrata) 

 LECHENAULT. H. — Lab. de Biol, gener., Fac. des Sci.. B. P.347, REIMS 

 (Marne), France 

 a. Cytochemistry of cellular differentiation in cephalic regeneration. (Oli- 

 gochaefa) 

 LE DOUARIN. G. H. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S.. 

 49bis Avenue de la Belle Gabrielle, NOGENT sur Marne (Seine), 

 France 



a. Action des rayons X sur la physiologie et le developpement du coeur 

 embryonnaire. Gallus gallus (Aves) 



b. Electrophysiologie du coeur embryonnaire. Gallus gallus (Aves) 



c. Metabolisme des organes embryonnaires en culture in vitro. 



LE DOUARIN (CHAUVAC), Mrs. N. M. — Inst. d'Embryol. et Teratol. 

 exper. du C.N.R.S., 49bis Avenue de la Belle Gabrielle. NOGENT sur 

 Marne (Seine), France 

 a. Etude experimentale du developpement du tube digestif. Gallus gallus 



(Aves) 

 h. Etude experimentale du developpement du foie. Gallus gallus (Aves) 

 LEES, A. D. M.A.. Ph.D. — A.R.C. Unit, of Insect Physiol., Dept. of Zool., 

 Downing St., CAMBRIDGE, England 

 a. Control of polymorphic development, with special reference to environ- 

 mental factors. Megoura viciae (Aphididae, Homoptera) 

 LEESON, C. R. M.A., M.D., M.B.. B.Chir., Prof. — Dept. of Anat.. Coll. of 

 Med.. Univ. of Iowa, IOWA CITY. Iowa 52241. U.S.A. 

 a. Postnatal development and differentiation of interstitial tissue of the 



testis. Rattus rattus (Rodentia) 

 h. Postnatal development of the "boundary tissue" of the seminiferous 

 tubule. Rattus rattus (Rodentia) 

 LEFFORD (FERNANDO), Mrs. F. M.B.B.S.. Ph.D. — Dept. of Anat. and 

 Embryol., Univ. Coll. London, Gower St., LONDON W.C.I, England 



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