d. Cultivation of isolated germ cells of early organ rudiments in the eye 

 chamber of larvae growing on different media. Rana ridibunda, R. arva- 

 lis, R. temporaria, Bombina bombina, Xenopus laevis (Anura) 

 LOS, J. A. Med.Dr. — Anat.-Embryol. Lab., Fac. of Med., State Univ. of 

 Leiden, Wassenaarseweg, Boerhaavekwartier, LEIDEN, Netherlands 

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

 Animalia (in collaboration with J. DANKMEIJER) 

 LOUVET, J. -P. Dr.Biol.anim. — Lab. de Zool. exper., Fac. des Sci. de Bor- 

 deaux, 40 Rue Lamartine, TALENCE (Gironde), France 

 a. Recherches descriptives et experimentales sur la formation de la bande- 

 lette embryonnaire. Carausius spec. (Orthoptera) 

 L0VTRUP, S. Dr.Phil., M.I.I.E. — Dept. of Histol., Univ. of Gothenburg, 

 Medicinaregatan 5, GOTEBORG-SV, Sweden 



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

 (Amphibia) 



b. Permeability and osmotic swelling. (Amphibia) 



c. The influence of low temperatures on chemical differentiation. (Amphi- 

 bia) 



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

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



a. Film of normal development. Gallus domesticus (Aves) 



b. Technique of in vitro culture of embryo; descriptive material cover- 

 ing first 72 hours of development in vitro. Gallus domesticus (Aves) 



LODTKE, H. Dr., Prof. — Zool. Inst, der Univ., Ketzerbach 63, 355 MAR- 



BURG/Lahn, Deutsche Bundesrepublik 

 a. Physiology of development. Carabus spec. (Carabidae, Coleoptera) , No- 



tonecta spec. (Notonectidae, Hemiptera) 

 LUDWIG, D. A.B., Ph.D., Prof. — 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) 



b. Study of respiratory enzymes during development. Tenebrio molitor (Co- 

 leoptera) 



c. Effects of parental age. Tenebrio molitor (Coleoptera) 



LUDWIG, K. S. Dr.med., Prof. — Anat. Inst, der Univ., Pestalozzistr. 20, 



BASEL, Schweiz 

 a. Studies on the placenta. Rhinoceros unicornis (Perissodactyla) , (Suinae 



et Bovinae, Artiodactyla) 

 LUTHER, W. Dr.Phil., M.I.I.E., Prof. — Zool. Inst, der Techn. Hochschule. 



DARMSTADT, Deutsche Bundesrepublik 



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 Biol. Anim., 1 Avenue Ver- 

 cingetorix, CLERMONT-FERRAND, France 



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

 bation. Anas spec. (Aves) 



b. La polyembryonie experimental; l'orientation des embryons. (Aves) 



c. Polyembryonie experimentale. (Salmonidae, Teleostei) (en collaboration 

 avec Mrs. Y. LUTZ (OSTERTAG) ) 



99 



