— Lab. d'Embryol. exper. du Coll. de France, 11 Place Marcelin Bcr- 

 thelot. PARIS Ve, France 



a. Mise au point d'une technique de culture in vitro d'organes et de 

 tissus en voie de regeneration, en adaptant la methode de Et.C. Wolff et 

 K.Haffen. Dugesia lugubris (Turbellaria) 



b. Etude des conditions de la regeneration du pharynx; influence sur cette 

 regeneration d'extraits de divers tissus et organes. Dugesia lugubris. D. 

 tigrina. Poly cells nigra (Turbellaria) 



ZIMMERMAN, A.A. M.I.I.E., Prof.(Emer.) — Dept. of Anat., Coll. of 

 Med., Baylor Univ., HOUSTON, Tex.. U.S.A. 



ZIMMERMANN, W. Dr.rer.nat. — Abt.f.Entw.physiol.der Haustiere, Max 

 Planck-Inst. f.Tierzucht u.Tieremahrung, 3051 MARIENSEE, Deut- 

 sche Bundesrepublik 



a. Histochemistry of the nidation process. Oryctolagus cuniculus (Lago- 

 morpha) 



b. Ontogeny of enzymes during embryonic development. (Mammalia) 

 ZOTIN, A.I. Dr.biol.sci. — Inst, of Animal Morphol., Acad, of Sci. of the 



U.S.S.R., Vavilov St. 12. MOSCOW V-133, U.S.S.R. 



a. Mechanism of cytokinesis in the cleavage of eggs, Strongylocentrotus 

 droebachiensis (Echinoidea) , Acipenser giildenstadti (Chondrostei), 

 Ambystoma mexicanum (Urodela) 



b. Energetics of development. Strongylocentrotus droebachiensis (Echi- 

 noidea), Acipenser giildenstadti (Chondrostei), Ambystoma mexicanum 

 (Urodela) 



c. Thermodynamics of development. Strongylocentrotus droebachiensis 

 (Echinoidea), Acipenser giildenstadti (Chondrostei) , Ambystoma me- 

 xicanum (Urodela) 



ZWAAN. J. M.D., Ph.D. — Dept. of Anat,, School of Med., Univ. of Vir- 

 ginia. CHARLOTTESVILLE. Va.. U.S.A. 



a. Analysis of protein synthesis during induction and differentiation of the 

 lens. Callus domesticus (Aves) 



b. Teratogenicity of drugs, and in particular of alkylating agents. Callus 

 domesticus (Aves) 



ZWILLING. E. Ph.D.. F.I.I.E. — Dept. of Biol.. Brandeis Univ.. WALT- 

 HAM. Mass.02154, U.S.A. 



a. Disaggregation and reaggregation of early embryos; effects on differ- 

 entiation. Callus domesticus (Aves) 



b. Culture behaviour of early embryonic tissues. Callus domesticus (Aves) 



c. Ectoderm-mesoderm interaction in limb development. Callus domesticus 

 (Aves) 



227 



