LOGGER (VAN DER HAGE), Mrs. M. H. Vet.Surg. — Veter. Anat. and 



Embryol. Inst., State Univ. of Utrecht, Bekkerstr. 141, UTRECHT, 



Netherlands 

 a. Normal and pathological development. (Mammalia) 

 LOPASHOV, G. V. Dr.biol.sci., M.I.I.E., Prof. — Inst, of Animal Mor- 



phol., Acad, of Sci. of the U.S.S.R.. Vavilov St. 12, MOSCOW V-133, 



U.S.S.R. 



a. Action of homogenate fractions and cell secretions from different organs 

 and their rudiments, and of some complex milieus on the development of 

 embryonic cells (gastrula ectoderm, eye vesicle) in isolated state, mono- 

 layers and aggregates of different sizes. Rana arvalis, R. temporaria, 

 R. ridibunda (Anura), Amby stoma mexicanum (Urodela) 



b. Developmental mechanisms and metaplastic potencies of the embryonic 

 and larval eye. Misgurnus [ossilis (Cobitidae), Leucisceus bergi 

 (Cyprinidae, Teleostei), Rana arvalis, R. temporaria, Bufo viridis 

 (Anura) (in collaboration with V. i. MITASKOV) 



c. Nuclear transplantation between some differentiated cells. Amby stoma 

 mexicanum (Urodela), Bufo bufo, B. viridis (Anura), Rattus norvegi- 

 cus (Rodentia) 



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



Leiden, Wassenaarseweg, Boerhaavekwartier, LEIDEN, Netherlands 

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

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

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

 lette embryonnaire. Carausius spec. (Orthoptera) 

 LOVE D. Ph.D. — Dept. of Anat., Developm. Biol. Center, Western Re- 

 serve Univ., 2127 Cornell Road, CLEVELAND, Ohio 44106, U.S.A. 

 a. Chemistry of developing muscle. 

 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) 

 h. Permeability and osmotic swelhng. (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 Rd., EDINBURGH 9, Scotland 

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

 h. Technique of in vitro culture of embryo; descriptive material 

 covering first 72 hours of development in vitro. Gallus domesticus 

 (Aves) 

 LODTKE. H. Dr., Prof. — Zool. Inst, der Univ., Ketzerbach 53. 355 

 MARBURG/Lahn, Deutsche Bundesrepubhk 



a. Physiology of development. Carabus spec. (Carabidae, Coleoptera), 

 Notonecta spec. (Notonectidae, Hemiptera) 



b. Morphological and functional development of sense organs. Rhodnius 

 prolixus (Hemiptera), Lebistes reticulatus (Teleostei), Gallus domes- 

 ticus (Aves) 



LUDWIG D. A.B., Ph.D., Prof. — Biol. Lab., Fordham Univ., NEW 

 YORK, Bronx, N.Y. 10458, U.S.A. 



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