a Development of retinal centrifugal fibers. Galhts domesficus (Aves) 



LE DOUARIN. G. H. Dr.es Sci. — Lab. de Physiol, anim. et cellulaire, Fac. des Sci. de 



rUniv. de Nantes. 38 Bd. Michelet. B.P. 1044. 44-NANTES. France 

 a Action des rayons X sur la physiologic ct le developpement du coeur embryonnaire. Callus 



qallus (Aves) 

 b Electrophysiologie du coeur embryonnaire. Callus gallus (Aves) 

 c Metabolisme des organes embryonnaires en culture in vitro 



d Etude experimentale de la diffcrenciation des cellules myocardiques. Gallus gallus (Aves) 

 e Etude experimentale de la diffcrenciation hypophysaire. Gallus gallus (Aves) 

 LE DOUARIN (CHAUVAC), Mrs. N. M. Dr.es Sci.. Prof. — Lab. d'Embryol., Fac. des 



Sci. de Nantes, 38 Bd. Michelet, B.P. 1044, 44-NANTES, France 

 a Etude experimentale du developpement du tube digestif. Gallus gallus (Aves) 

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

 c Etude de la diffcrenciation biochimique des hepatocytes. Gallus gallus (Aves) 

 d Etude experimentale de la diffcrenciation hypophysaire. Gallus gallus (Aves) 

 e Etude experimentale de la diffcrenciation dc la glande thyroide. Gallus gallus (Aves) 

 LEDOUX. L. D.Sc. — Lab. de Biochim. cell., Dept. de Radiobiol., Centre d'Etude de 



I'Energie Nucleaire, MOL, Belgium 

 a Uptake, fate, and biological effect of exogeneous DNA in living systems, with special 



attention to embryonic and cancer tissues. Hordeum spec, Avabidopsis spec. (Angiosper- 



mae), Gallus spec. (Aves), Mus spec. (Rodentia) 

 LEE. H. H. Ph.D. — Dept. of Biol., Univ. of Toledo, TOLEDO, Ohio 43606, U.S.A. 

 a In vitro studies of DNA synthesis induced by Rous sarcoma virus infection in 



differentiating embryonic cells. Gallus gallus (Aves) 

 b Cytodifferentiation and cell interactions in vitro of testicular tissues with respect to 



DNA and cell cycle studies. Gallus gallus (Aves) 

 LEES, A. D. Sc.D.. F.R.S. — Imperial Coll. Field Station, SunninghiU, SILWOOD PARK, 



Berks., England 

 a Control of polymorphic development, with special reference to environmental factors. 



Megoura viciae (Aphididae, Homoptera) 

 LEESON, C. R. M.D., Prof. — Dept. of Anat., Coll. of Med., Univ. of Missouri, COLUM- 

 BIA, Mo. 65201, U.S.A. 

 a Postnatal development and differentiation of the ductus epididymidis with special em- 

 phasis upon the epithelium and the appearance of stereocilia. Rattus rattus (Rodentia) 

 b Postnatal development of muscle with emphasis on the ultrastructure of the mitochondrial 



population. Sus domesticus (miniature) (Atfiodactyla) 

 LEFFINGWELL, T P. Ph.D. — Cell Research Inst., B.L. 220, The Univ. of Texas at 



Austin. AUSTIN, Tex. 78712, U.S.A. 

 a Site of synthesis and mode of deposition of primary wall constituents in distinctively 



differentiated tissues of the primary root; characterization of the Golgi-mediated wall poly- 

 saccharides (isotope labelling, autoradiography, histochemistry). Zea mays (Gramineae) 

 LEFFORD (FERNANDO), Mrs. F. Ph.D. — Dept. of Anat. and Embryol., Univ. Coll., 



Cower St., LONDON W.C.I, England 

 a Studies on cell locomotory behaviour in tissue culture. Gallus domesticus (Aves), Cavia 



spec. (Rodentia) 

 LEGAIT, E. J. Prof. — Lab. d'Histol., Fac. de Med., 31 rue Lionnois, 54 NANCY, France 

 LEGAY, J. M. Dr.es Sci., Prof. — Sect, de Biol. Gener. et Appl., Fac. des Sci. de Lyon, 



43 Bd. du 11 Novembre 1918, 69 VILLEURBANNE, France 

 a Postembryonic development in relation to parental generation and selection. Bombyx mod 



(Lepidoptera), Ceratitis capitata (Diptera) 

 LEGENDRE, R. Dr.rer.nat., Dr.es Sci., Prof. — Lab. de Zool., Fac. des Sci. de Montpellier, 



Place Eugene Bataillon, 34 MONTPELLIER, France 

 a Embryonic and post-embryonic development. (Araneida, Arachnida) 

 LEGHISSA, S. Ph.D., Prof. — 1st. di Anat. Comp., Univ. di Bologna, Via Belmeloro 8, 



BOLOGNA (103), Italy • 



LEGNAME, A. H. Dr.Biochem. — Inst, de Biol., Univ. Nac. de Tucuman, Chacabuco 460, 



S. M. de TUCUMAN, Argentina 

 a Respiratory metabolism. Bu[o arenarum (Anura) 

 b Mitochondria during embryogenesis. Bufo arenarum (Anura) 

 LEGNAME, C. R. — Inst, de Biol., Univ. Nac. de Tucuman, Chacabuco 460, S. M. de 



TUCUMAN, Argentina 

 a Nuclear transplantation (early stages until neurulation). Bufo arenarum (Anura) 

 LE GOASCOGNE, C. D.E.S. — Inst. Natl, de la Sante et de la Rech. Med., Unite de 



Physiol, placentaire. Hop. Saint- Antoine, 184, rue du Faubourg Saint-Antoine, PARIS 12e, 



France 

 a Anatomic vasculaire, ultrastructure et physiologic de la vesiculc ombilicale (omphalopla- 



centa). Rattus norvegicus albinus, Cavia cobaya (Rodentia) 

 h Culture organotypiquc dc la vesiculc ombilicale. Microscopic clectronique. Rattus nor' 



vegicus albinus (Rodentia) 

 c Developpement in vitro des blastocystes. Rattus norvegicus albinus (Rodentia) 



103 



