Lopashov-Mac 



c. Analysis of sources and conditions of retina regeneration in tadpoles. 



Bu[o viridis. Rana arvalis (Anura) 

 LOS, J. A. Med.Drs — Anat.-Ebryol. Sch. of the Univ. of Leyden, Fac. 



of Med.. Wasscnaarseweg. Boerhaavekwartier. LEIDEN, Holland 

 a. Normal and abnormal development of the heart. Homo sapiens and other 



Animalia (in collaboration with J. DANKMEIJER) 

 LOVELACE, Miss L. R. B.S.. M.S., Ph.D. — Dept of Biol., Univ. of South 



Carolina. COLUMBIA. S.C, U.S.A. 

 L0VTRUP, S. Dr Phil. — Fac. of Med., Univ. of Gothenburg. 4: de Lang- 



gatan 7. GOTEBORG, Sweden 



a. Chemical differentiation during development at different temperatures. 

 Enzymes and nucleic acids. Siredon mexicanum (Urodela), Rana tern- 

 poraria (Anura) 



b. Metabolism during development at different temperatures. Siredon 

 mexicanum (Urodela) 



c. Mechanism of determination of bilateral symmetry and of gastrulation. 

 (Amphibia) 



LUCEY, E. C. A. B.Sc. — Inst, of Animal Genet., Univ. Dept of Genet., 

 King's Buildings, West Mains Rd, EDINBURGH 9, Scotland 

 a. Film of normal development. Oryctolagus cuniculus (Lagomorpha) (in 

 collaboration with R. A. BEATTY) 



LODTKE, H. Dr, Prof. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- 

 BURG i. Brsg., Deutschland 



LUDWIG, D. A.B.. Ph.D. — Biol. Lab., Fordham Univ., NEW YORK 58, 

 N.Y., U.S.A. 



a. Effects of substrates and inhibitors on oxygen consumption of homoge- 

 nates during embryonic development. Tenebrio molitor, Popillia japonica 



(Coleoptera) (Coleoptera) 



b. Study of respiratory enzymes during development. Tenebrio molitor 

 LUDWIG, K. S. M.D. — Anat. Inst., Pestalozzistr. 20, BASEL, Schweiz 

 LUGLI, Miss L. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, 



MODENA. Italia 

 a. Activity of sex hormones on the sex differentiation of gonads and Bid- 

 der's organs. Bufo bulo (Anura) 

 LtiSCHER, M. DrPhil., a.o. Prof. — Abt. f. Zoophysiol., Zool. Inst, der 

 Univ. Bern, Sahlistr. 8, BERN, Schweiz 



a. Differentiation of castes in termites, especially the determination of sup- 

 plementary reproductives in primitive termites. Kalotermes flavicollis 

 (Fabr.) (Isoptera, Insecta) 



b. Descriptive and experimental study of the glands producing moulting 

 and metamorphosis hormones. Zootermopsis nevadensis (Hagen) (Isop- 

 tera, Insecta) 



LUTHER, W. Dr Phil., Prof. — Zool. Inst, der Technischen Hochschule, 

 DARMSTADT, Deutschland 



a. Regeneration (limb, skin). (Urodela) 



b. Effects of ionizing radiations on regeneration. Various spp. (Amphibia), 

 Rattus norvegicus. Mesocricetus auratus (Rodentia) 



LUTZ, H. Dr es Sci., M.I. I.E., Prof. — Lab. de Zool., 1 Avenue Vercinge- 

 torix, CLERMONT-FERRAND, France 

 a. Developpement du blastoderme pendant les premieres heures de I'incu- 

 bation. Anas spec. (Aves) 



68 



