LASSAU, J. P. Lab. d'Anat., Univ. Paris V Rene Descartes, 45 rue des Saints Peres, 



75 PARIS Vie, France 

 LASSEGUKS (FLAMAND), Mrs. M. Dr.Biol.anim. Lab. de Zool. Exper., Univ. de Bordeaux I, Av. 



des Facultes, 33405 TALENCE, France 

 a 1 mbryologie. Sphaeroma spec. (Isopoda, Crustacea) (avec N. DAGUERRE de HURLAUX) 

 LAUGA, Mrs. F. M. J. Dr.3e Cycle Lab. de Biol. Gen., Univ. Paul-Sabatier, Route de 



Narbonne 118, 31077 TOULOUSL Cedex, France 

 a Regeneration de la machoire et des dents; etude descriptive et experimentale du blasteme de 



regeneration (determinisme, differenciation) par greffes et cultures d'organes. Pleurodeles waltlii 



(Urodela) 

 LAUGE\ MissG. Dr.es Sci. - Lab. d'Entomol. et d'Ecophysiol. Exper., Univ. de Paris XI, 91405 



ORSAY, I'rance 

 a Differentiation of genital apparatus. (Diptera) 

 b Cytology of agametic gonads after U.V. irradiation during the polar cells stage. Drosophila 



melanogaster (Diptera) 

 c Modifications of gonad development by thermal stress. Same species as b 

 LAUTHIER, M. Dr.3eme cycle - Centre de Rech. d'lvry sur Seine du CNRS, 67 rue Maurice 



Gunsbourg, 94200 IVRY sur SEINE, France 

 a Organogenese des membres (histochimie, microchirurgie, cytologie ultrastructurale, teratogenese 



experimentale). Pleurodeles waltlii (Urodela) 

 LAVELLE, C. L. B. Ph.D. - Dept. of Oral Pathol., Dental School, Univ. of Birmingham, St. Chads 



Queensway, BIRMINGHAM B4 6NN, England 

 a Embryology of the skull and of dental cusp pattern. Rattus norvegicus (Rodentia), Homo sapiens 



(Primates) 

 LAVERDURE, Miss A. M. - Lab. de Biol. Anim., Fac. des Sci., Univ. Paris Sud, Bat. 445, 91405 



ORSAY, France 

 a Differenciation de la gonade femelle et vitellogenese. Tenebrio molitor (Coleoptera) 

 LAWRENCE, A. J. Ph.D. - Dept. of Cell Biol., Univ. of Glasgow, GLASGOW Gil 6NU, Scotland, 



U.K. 

 LAWRENCE, P. A. Ph.D. - Lab. of Mol. Biol., Med. Res. Council, Hills Rd., CAMBRIDGE CB2 



2QH, England 

 a The development of bristles; in particular factors controlling their position and their initiation. 



Oncopeltus fasciatus (Heteroptera) 

 b Developmental genetics. Oncopeltus fasciatus (Heteroptera) 



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

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

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



centrum 'De Uithof , UTRECHT, Netherlands 

 a Morphogenetic and growth control of salivary glands in vitro. Rattus norvegicus, Mus musculus 



(Rodentia) 

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



vitro. Gallus domesticus (Aves) 

 LAZARD (HAUBEN), Mrs. L. Dr. es Sci. - Inst. d'Embryol. Exper. du Coll. de France et du 



C.N.R.S., 1 1 Place M. Berthelot, 75 PARIS Ve, France ISDB 



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



mexicanum (Urodela) 

 b Development of gonads grafted in a heterotopic site; influence of sex, age, and castration of the 



host. Ambystoma mexicanum (Urodela) 

 c In vitro culture of gonads. Ambystoma mexicanum (Urodela) 



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

 LE DOUARIN, G. H. Dr.es Sc. - 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, 44037 NANTES CEDEX, 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 differenciation de la glande thyroide et de la hypophyse. Gallus gallus (Aves) 

 d Experiments sur le developpement du thymus. Gallus gallus, Coturnix c. japonica (Aves) 

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



species as d 

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



Nucleaire, 2400 MOL, Belgium 

 LEENDERS, H. J. Dr. - Dept. of Genet., Univ. of Nijmegen, Toernooiveld, NIJMEGEN, Netherlands 

 a The mechanism of gene activation by factors involved in respiratory metabolism; experimental 



puff induction. Drosophila hydei (Diptera) 

 LEES, A. D. Sc.D. - Dept. of Zool. and Appl. Entomol., Imperial Coll., London Univ., Field Station, 



Ashurst Lodge, ASCOT, Berks., England 

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



viciae (Aphididae, Homoptera) 

 LEFEBVRE (AUDOUIN), Mrs. C. A. Lab. d'Embryol., U.E.R. de Sci., Univ. de Caen, 14032 CAEN, 



France 

 a L'influence de la temperature sur la duree des phases du cycle cellulaire en cours de 



segmentation. Ambystoma mexicanum (Urodela) 

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



58 



