HHHS' *£ ^ii, Ph- ?' ~ S e l L °? Z r° oL ' H niv - of Manit °ba, WINNIPEG 19, Man., Canada 

 LAANE, H. M. — Anat.-Embryol. Inst., Univ. of Amsterdam, Mauritskade 61, AMSTER- 



DAM-O., Netherlands 

 a Light microscopy, electron-microscopy, histochemistry, physiology, and experimental 



teratogenesis of heart development in the embryo. Gallus domesticus (Aves), Mus musculus 



(Rodentia) (with J. A. ROEST and J. A. LOS) 

 LAAT, S. W. de M.Sc. — Hubrecht Lab. (Intern. Embryol. Inst.), Uppsalalaan 1 Universi- 



teitscentrum "De Uithof", UTRECHT, Netherlands 

 a Electrical coupling and membrane permeabilities for cations during early development. 



Xenopus laevis, Ambystoma mexicanum (Amphibia) 

 b Electrophysiology and electron microscopy of the effect of cytochalasin B on the 



mechanism of first cleavage. Xenopus laevis (Anura) (with J. G. BLUEMINK) 

 c Electrophysiology of development. (Acrasiales) (with Th. M. KONIJN) 

 LABORDUS, V. Ph.D. — Zool. Lab., State Univ. of Utrecht, Janskerkhof 3, UTRECHT, 



Netherlands 

 a The effect of UV-light on cleavage and morphogenesis. Lymnaea stagnalis (Gastropoda) 

 b Repair processes in eggs after UV-irradiation. Same species as a 



LABOUR, G. R. — Lab. de Zool., Centre d'Orsay, Univ. Paris-Sud, 91 ORSAY, France 

 a Cytology of fat body development, with special reference to cell ultrastructure and 



cytochemistry. Leptinotarsa decemlineata (Coleopteca) 

 LACALLI, Th. C. B.S. — Dept. of Zool., Univ. of British Columbia, VANCOUVER 8, B.C., 



Canada 

 a Study by laser microbeam of the new spatial patterns generated by irradiation of the 



cytoplasm and developing cell wall. Micrasterias rotata, M. denticulata, M. radiata 



(Desmidiales) (with A. B. ACTON) 

 b Possible mathematical models for generating very non-random arrays of microscopic 



particles; experimental testing of the models with pore bodies in the cell wall. Same 



species as a (with A. B. ACTON) 

 LaCHANCE, L. E. Ph.D. — Metabol. and Radiat. Res. Lab., State Univ. Stat., FARGO, 



N.D. 58103, U.S.A. 



— temporarily: FAO/IAEA Div. of Atom. Energy in Agric, Internat. Atom. Energy 



Agency, Karntner Ring 11, A-1010 WIEN 1, Austria 

 LACROIX, J. C. — Lab. d'Embryol., Univ. de Paris VI, 9 quai Saint Bernard, 75 PARIS Ve, 



France • 



a Gene activity in oogenesis; RNA and protein synthesis (lampbrush chromosomes); fate 



of oocyte products in embryogenesis. Pleurodeles waltlii, P. poketi (Urodela) 

 b Cytological detection of mutations with lampbrush chromosomes. Same species as a 

 LA CROIX, L. J. Ph.D., Prof. — Dept. of Plant Sci., Fac. of Agric, Univ. of Manitoba, 



WINNIPEG 19, Man.. Canada 

 LADAS, A. Dr. — Inst, fur Landwirtsch. Zool. und Bienenk. der Univ., Melbweg, 53 BONN, 



W.Germany 

 a Pathological abnormalities in development, caused by herbicides. Apis mellifera (Hymenop- 



tera) 

 LAFONT. R. D A. M.S. — Lab. de Zool., Ecole Norm. Superieure, 46 rue d'UIm, 75 PARIS 



Ve, France 

 a Differentiation of imaginal wing discs: nucleic acids and pteridine metabolism, changes in 



enzyme titers. Pieris brassicae (Lepidopteva) 

 b Action of 5-fluorouracil (5-FU) and other chemical agents on the development of imaginal 



discs. Same species as a 

 LAGUCHEV, S. S. Dr.med.sci. — Lab. of Cytol., Inst, of Med. Genet., Acad, of Med. Sci. 



of the U.S.S.R., Baltiyskaya St. 8, MOSCOW 125315, U.S.S.R. 

 a Electron microscopy of gonocytes and oogonia in the embryo. Homo sapiens (Primates) 

 LAHTI, A. — Lab. of Exper. Embryol., III. Dept. of Pathol., Univ. of Helsinki, Haartmanin- 



katu 3, HELSINKI 29, Finland 

 a Drug-induced teratogenesis in vitro. Mus musculus (Rodentia) (with L. O. SAXEN 



and I. KAITILA) 

 LAI-FOOK, Miss J. E. I. Ph.D. — Dept. of Zool., Univ. of Toronto, 25 Harbord St., 



TORONTO 5, Ont, Canada 

 a Fine structure of haemocytes during the moult/intermoult cycle. Galteria mellonella, 



Calpodes ethlius (Lepidopteva) 

 b Fine structure and histochemistry of developing dermal glands. Rhodnius prolixus 



(Hemiptera) , Calpodes ethlius (Lepidoptera) 

 LAIRD, C. D. Ph.D. — Dept. of Zool., Univ. of Washington, SEATTLE, Wash. 98105, 



U.S.A. 

 a Relationship between developmental patterns and genome organization. (Insecta; Tunicata; 



Mammalia) 

 b Developmental genetics of linked genes; correlation of gene expression with karyotype 



arrangement. Dcosophila melanogaster (Dipteta) 

 LAKSHAMANAN, K. K. Ph.D., Prof. — Dept. of Bot, Pachaiyappa's Coll., MADRAS-30, 



India 



103 



