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



puff induction. Drosophila hydei (Diptera) 

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



Silwood Park, ASCOT, Berks. SL5 7PY, England 

 a Control of polymorphic development with special reference to environmental factors and 



hormones. Megoura viciae (Aphididae, Homoptera) 

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



St., LONDON WCIE 6BT, England 

 a Migratory behaviour of cells in vitro 



LEFRESNE, J.; Maftre es Sci. - Lab. d'Embryol., Unite de Sci., Univ. de Caen, 14032 CAEN, France 

 a Etude experimentale de la segmentation. Ambystoma mexicanum (Urodela) 

 LEGAY, J. M.; Dr.es Sci., Prof. ~ Sect, de Biol. Gener. et Appl., Univ. de Lyon L 43 Bd. du 11 



Novembre 1918, 69621 VILLEURBANNE, France 

 LEGENDRE, R.; Dr.rer.nat., Dr.es Sci., Prof. - Lab. de Zool. II, (Morphol. et Ecol), Univ. des Sci. et 



Techn. du Languedoc, Place Eugene Bataillon, 34060 MONTPELLIER, France 

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

 LEGRAND, Ch.; D.Sc. - Lab. de Biol, de la Reprod., Univ. P.et M.Curie, Tour 32, Rez de Chaussee, 4 



place Jussieu, 75230 PARIS Cedex 05, France 

 a Fonctions, morphogenese et cytophysiologie du trophoblaste intra-arteriel. Rattus norvegicus 



(Rodentia) 

 LEGRAND (HAMELIN), Mrs. E.; Dr. - Lab. de Physiol, et Genet, des Crustaces, Univ. de Poitiers, 40 



av. du Recteur Pineau, 86022 POITIERS, France 

 a Controle genetique et humoral du sexe. Idotea balthica (Isopoda, Crustacea) 

 b Sex determination. Dynamene bidentata (Isopoda, Crustacea) 

 LEGRAND, J. J.; Dr., Prof. - Lab. de Physiol, et Genet, des Crustaces, Univ. de Poitiers, 40 av. du 



Recteur Pineau, 86022 POITIERS, France 

 a Controle genetique, epigenetique et humoral du sexe chez des especes gonochoriques et herma- 

 phrodites. Porcellio dilatatus, Armadillidium vulgare, Anilocra frontalis (Isopoda, Crustacea) 

 LEHTONEN, E. I.;M.D. - Lab. of Exp. Embryol., III. Dept. of Pathol., Univ. of Helsinki, Haartmanin- 



katu 3, 00290 HELSINKI 29. Finland 

 a Mechanism of kidney tubulogenesis. Mus musculus (Rodentia) (with L. O. SAXEN, J. J. 



WARTIOVAARA and S. NORDLING) 

 LEHTONEN, J. - Dept. of Bot., Univ. of Turku, 20500 TURKU 50, Finland 

 a Macrotemplate system: especially effect of structural changes in growth centers on development 



of new semicells (micro-beam UV irradiation; cytochalasin and puromycin techniques). 



Micrasterias spec. (Desmidiaceae) 

 LEIBENGUTH, F.; Dr.rer.nat., Prof. - Inst, fur Genet., Univ. des Saarlandes, 66 SAARBRUCKEN 11, 



B.R.D. (Germany) 

 a Mechanisms controlhng ontogeny and tissue distribution of isoenzyme patterns by differential 



allele activity. Ephestia (=Anagasta) kUhniella (Lepidoptera) 

 b Onset of embryonic gene expression in vivo and in vitro. Drosophila melanogaster (Diptera) 

 LEIKOLA, A. H. A.; Ph.D. - Lab. of Exp. Embryol., Dept. of Zool., Univ. of Helsinki, Arkadiankatu 



7, 00100 HELSINKI 10, Finland 

 a Primary determination of the central nervous system. Triturus vulgaris (Urodela), Gallus 



domesticus, Coturnix coturnix (Aves) 

 LELIEVRE, Miss C. S. - Lab. d'Embryol., Univ. de Nantes, 38 Bd.Michelet, B.P. 1044, 44037 



NANTES Cedex, France 

 a Participation des cellules issues des cretes neurales cephaliques a la formation des structures 



pharyngiennes. Gallus gallus, Coturnix c. japonica 

 LEMEZ, L.; MUDr. - Dept. of Anat., Charles Univ., U nemocnice 3, 12800 PRAHA 2, Czechoslovakia 

 a Experimental topogenesis and morphology of the pneumogastric system. Gallus domesticus 



(Aves) 

 b Thrombocyte development. Same species as a 

 c Erythrocyte life span in the embryo. Same species as a 

 LE MOIGNE, A.; Prof. - Fac. des Sci., Univ. Val de Marne (Paris XII), Av. du Gen. de Gaulle, 94000 



CRfiTEIL, France 

 a Devcloppement embryonnaire (microscopic electronique). (Planariidae, 1 urbellaria) 

 b RNA and protein syntiiesis, and cellular differentiation in regeneration (electron microscopy, 



biochemistry). Same species as a 

 c Bioelectric currents and wound healing. Mus musculus, Rattus spec. (Rodentia) 

 LEMTIS, H. G.; Dr.med., Prof. Spec. Team of Exp. Gynecol, of the Dept. of Obstet. and Gynecol., 



Klin. Stcglitz, Free Univ. of Berlin, Ilindenburgdamm 30, 1 BERLIN 45, B.R.D., (Germany) 

 a Architecture of the fetal and maternal placental blood vessels (corrosion preparations), and 



correlation of abnormal placenta! circulation with congenital malformations. Homo sapiens 



(Primates) 

 LENDER, Th.; Prof. Lab. de Biol. Anim. A, Fac. des Sci., Univ. Paris-Sud, Bat.445, 91405 ORSAY, 



France 

 a Regeneration: substances inductrices et inhibitrices. (Planariidae, Turbellaria) 

 b Microscopic electronique de la regeneration, en particulicr des neoblastes. Dugesia gonoccphala 



(Turbellaria) 

 c Neurosecretion. Same species as a 

 d Regeneration. Asterina gibbosa (Asteroidea) 



e Culture in vitro d'organos larvaires. Galleria spec. (Lepidoptera), Periplaneta spec. (Blattariae) 

 f Culture in vitro de gonades femelles. Tenebrio molitor (Coleoptera) 



62 



