GRECA, M. la Dr.nat.Sci., Prof. — 1st. di Zool. dell'Univ., Via Androne 

 81, CATANIA, Italia 



a. Istologia e citologia delle gonadi, con particolare riferimento alia vitel- 

 logenesi. (Orthoptera) 



b. Rigenerazione, con particolare riferimento ai blastemi rigenerativi. (Poly- 

 chaeta) 



GRECO, M. Cand.phil. — Zool.-vergl.Anat. Inst., Naturwiss. Fak., Univ. 



Zurich, Kiinstlergasse 16, ZURICH, Schweiz 

 a. Changes in free amino acids and peptides during embryonic development 



(paper chromatography). Rana temporaria (Anura) 

 GREEN, Mrs. E. UFFORD A.B., M.A., Ph.D. — Dept. of Biol., Haverford 



Coll., HAVERFORD, Pa., U.S.A. 



a. Studies of mitotic and intermitotic times in embryos and tadpoles as 

 related to age, to sizes of cells and nuclei and to the action of carcinogens. 

 Rana pipiens (Anura) 



b. Analysis of nucleic acid base composition in relation to development and 

 differentiation. Paramecium aurelia (Ciliata), Rana pipiens (Anura) 



GREEN, Mrs. M. C. Ph.D. — Roscoe B. Jackson Memorial Lab., BAR 

 HARBOR, Me., U.S.A. 

 a. Developmental genetics. Mus musculus (Rodentia) 

 GREENFIELD, Miss M. L. B.Sc. — Dept. of Anat. and Embryol., Univ. 

 Coll. London, Gower St., LONDON W.C. 1, England 

 a. An electron microscopical study of oogenesis in the fowl. Gallus domesti- 

 cus (Aves) (in collaboration with Mrs. M. R. BELLAIRS) 

 GREGG, J. R. B.S., Ph.D., M.I.I.E., Prof. — Dept. of Zool., Duke Univ., 

 DURHAM, N.C., U.S.A. 



a. Metabolism of normal animals and hybrids. Rana pipiens, R. pipiens 

 9 x R. Sylvatica Q* (Anura) 



b. Metabolism of normal and hybrid tissue-breis. Rana pipiens, R. pipiens 

 9 x R. sylvatica (f (Anura) 



GREIJ, E. D. — Dept. of Biol., Univ. of Ottawa, OTTAWA, Ontario, Canada 



a. The normal developmental stages. Percopsis omiscomaycus (Teleostei) 



GRELL, K. G. Dr.rer.nat., Prof. — Zool. Inst, der Univ. Tubingen, Holder- 



linstr. 12, TOBINGEN, Wurttemberg, Deutsche Bundesrepublik 

 a. Entwicklung und Fortpflanzung. Patellina corrugata (Rotaliidae, Fora- 



minifera), Ophryotrocha puerilis (Eumicidae, Polychaeta) , Haminea hy- 



datis (Bullidae, Opisthobranchia) 

 GRIGNON. G. Lie. es Sci. — Lab. d'Histol., Fac. de Med., 31 Rue Lionnois, 



NANCY (Meurthe & Moselle), France 

 GROBSTEIN, C. Ph.D., M.I.I.E. — Dept. of Biol. Sci., Stanford Univ., 



STANFORD, Calif., U.S.A. 



a. Epithelio-mesenchymal relationships in pancreatic differentiation. 



b. The nature and behavior of interface materials in inductive systems. 

 GRODZINSKI, Z. Mr., M.I.I.E., Prof. — Zaklad Anat., Porownawczej U.J. 



im H. Hoyera, sw. Army 6, KRAKOW, Poland 

 GROENENDIJK (HUIJBERS).Mrs. M. M. M.D.,D.Sc. — Anat.-Embryol. 

 Lab., State Univ. of Utrecht, Janskerkhof 3A, UTRECHT, Netherlands 



a. Characteristics and source of the embryonic gonadal hormones, by means 

 of embryonic castration and hormone treatment. Gallus domesticus (Aves) 



b. Interrelation between gonads and pituitary gland of the embryo. Gallus 

 domesticus (Aves) 



63 



