c Positional information and polarity in the epidermal cells. Rhodnius prolixus (Heteroptera) 



d Clonal analysis of segment growth. Oncopeltus fasciatus (Heteroptera) 



LAWSON, Miss K. A. Ph.D. — Hubrecht Lab. (Intern. Embryol. Inst.), Uppsalalaan 1, 



Universiteitscentrum "De Uithof", UTRECHT, Netherlands 

 a Morphogenetic and growth control of salivary glands in vitro. (Rodentia) 

 b Proportionate development of the appendicular skeleton and the action of thyroid hormones 



in vitro. G alius domesticus (Aves) 

 LAYTON W. M. M.D., Prof. — Dept. of Pathol., Dartmouth Med. School, HANOVER, 



N.H. 03755. U.S.A. 

 a The mechanism of the teratogenic action of carbonic anhydrase inhibitors. Mesocncetus 



auratus (Rodentia) 

 b Limb morphogenesis. Amby stoma maculata (Ucodela) , Mesocricetus auratus, Rattus 



norvegicus (Rodentia) 

 LAZARD (HAUBEN), Mrs. L. Dr.es Sci. — Inst. d'Embryol. et Teratol. Exper. du 



C.N.R.S., 49bis Av. dc la Belle Gabrielle, 94 NOGENT-sur-MARNE, France • 



a Limb regeneration after x-irradiation, and grafts of various tissues and organs. Ambystoma 



mexicanum (Urodela) 

 LEACH, C. M. Ph.D., Prof. — Dept. of Bot. and Plant Pathol., Oregon State Univ., 



COR VALLIS, Ore. 97331, U.S.A. 

 a Light induction of reproduction in phytopathogenic species. (Fungi) 

 b Nature of sporogenic substances "P310" associated with spore formation. (Fungi) 

 c Interaction of light and temperature on the induction of reproduction. (Fungi) 

 LEBHERZ. H. Ph.D. — Lab. for Developm. Biol., Swiss Fed. Inst, of Technol., Sonneggstr. 



5, 8006 ZURICH, Switzerland 

 a Transcriptive activity of chromatin. Drosophila melanogastec (Dipteca) 

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



MONTREAL 2, Que., Canada 

 n Development of the thyroid gland. (Vectebrata) 

 b The development of bones and teeth as shown on radioautographs with the help of 



various labeled substances. (Vertebrata) 

 LECHENAULT, H. M. M.A. — Lab. de Biol. Cell, Fac. des Sci., B.P. 347, 51 REIMS, 



France 

 a Histo- and biochemistry of hydrolases during head regeneration (lysosomal fractions in 



activation and morphogenesis) . Eisenia foetida (Oligochaeta) 

 b Interdependence between protein and ribonucleic acid synthesis during activation and 



before mitosis in regeneration. Same species as a 

 LE DOUARIN, G. H. Dr.es Sci. — Lab. de Physiol. Anim. et Cell., Univ. de Nantes, 38 Bd. 



Michelet, B.P. 1044. 44 NANTES, France 

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



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

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

 b Differenciation biochimique des hepatocytes. Gallus gallus (Aves) 

 c Experiments sur la differentiation de la glande thyroide et de la hypophyse. Gallus gallus 



(Aves) 

 d La migration et la differenciation des cellules des cretes neurales (greffes interspecifiques) . 



Coturnix japonica, Gallus gallus (Aves) 

 LEDOUX, L. D.Sc. -, Lab. de Biochim. Cell., Dept. de Radiobiol., Centre d'Etude de 



l'Energie Nucleaire, 2400 MOL, Belgium 

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



attention to embryonic and cancer tissues. Hordeum spec, Arabidopsis spec. (Angio- 



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

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

 LEENDERS, H. J. Dr. — Zool. Lab., Dept. of Cell Biol., Univ. of Nijmegen, Driehuizerweg 



200, NIJMEGEN, Netherlands 

 a The mechanism of gene activation by factors involved in the electron transfer system; 



experimental puff induction. Drosophila hi;dei (Dipteva) 

 LEES. A. D. Sc.D., F.R.S. — Imperial Coll., Field Station, Silwood Park, ASCOT, 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 of the liver, with reference to hepatocyte morphology and 



hematopoietic activity. Oryctolagus cuniculus (Lagomorpha) 

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



population. Sus domesticus (miniature) (Artiodactula) 

 LEFFINGWELL, T. P. Ph.D. — Cell Res. Inst.,' B.L. 220, Univ. of Texas, AUSTIN, 



Tex. 78712. U.S.A. 

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



London, Gower St., LONDON WC1E 6BT, England 



106 



