c. Differentiation in tissue culture. Gallus spec. (Aves) (in collaboration 

 with A. FROHLICH) 



d. Studies of differentiation by immunological and chromatographic tech- 

 niques. Mus musculus (Rodentia) 



e. Immunological study of nucleoproteins. Gallus spec. (Aves) (in colla- 

 boration with F. BILLETT and A. FROHLICH) 



CLEAT, N. D. B.Sc. — Dent of Genet.. The University, GLASGOW W. 2, 

 Scotland (U.K.) 



CLEGG. E. J. M.B., Ch.B. — Dept of Anat., Univ. of Liverpool. LIVER- 

 POOL. England 

 a. Age changes in the fructose content of the coagulating gland. Rattus 



spec. (Mammalia) 

 h. Effects of low atmospheric pressure on the reproductive and endocrine 

 systems of laboratory animals. (Mammalia) 



CLEMENT. A. C. Ph.D.. M.I.I.E., Prof. — Dept of Biol., Emory Univ.. 

 ATLANTA, Ga. U.S.A. 



a. Localization of morphogenic factors: experimental analysis. Ilyanassa 

 obsoleta (Gastropoda) 



b. Distribution of mitochondria and lipid droplets during early development. 

 Ilyanassa obsoleta (Gastropoda) (in collaboration with F. E. LEH- 

 MANN) 



c. Cytochemical and physiological studies of early development. Ilyanassa 

 obsoleta (Gastropoda) 



CLEMENTS. L. P. Dr — Dept of Anat.. School of Med., The Creighton 



Univ., OMAHA, Nebraska, U.S.A. 

 COHEN, A. I. Ph.D. — Dept of Anat., Med. School, Washington Univ., 



ST LOUIS 10, Mo.. U.S.A. 

 COHN, S. A. B.S., M.S., Ph.D. — Div. of Anat., Med. Units Div.. Fac. of 



Biol. Sci., Univ. of Tennessee, MEMPHIS 3, Tenn., U.S.A. 



a. The development of glands of ectodermal origin. Gallus domesticus 

 (Aves), Mus musculus (Rodentia) 



b. Cytological. cytochemical and histochemical studies on the initiation of 

 secretory activity in developing ectodermal glands. Mus musculus (Ro- 



c. Studies of tooth development. Mus musculus (Rodentia) dentia) 

 COLOMBO. G. Dr Biol.Sci. — 1st. di Zool. e Anat. comp.. Fac. di Sci., Via 



Loredan 10. PADOVA, Italia 



a. Chromosomes in early development. (Amphibia) 



h. Effects of hormones on cleavage and early development. (Amphibia) 



c. Gametogenesis. (Arthropoda) 

 COLWIN. A. L. Ph.D., M.I.I.E., Prof. — Dept of Biol., Queens Coll.. 

 Flushing 67, L.I.. NEW YORK. N.Y., U.S.A. 



a. Fertilization: sperm-egg association and sperm penetration; cortical 

 changes; membrane changes, lytic aspects. Living material and electron 

 microscope studies. Enteropneasta, Echinodermata. Annelida) (in col- 

 laboration with Mrs L. H. COLWIN) 

 COLWIN, Mrs L. HUNTER Ph.D., Prof. — Dept of Biol. Queens Coll., 

 Flushing 67, L.I., NEW YORK. N.Y., U.S.A. R 



a. Fertilization: sperm-egg association and sperm penetration; cortical chan- 

 ges; membrane changes; lytic aspects. Living material and electron 

 microscope studies. ( Enter opneusta, Echinodermata, Annelida) (in col- 

 laboration with A. L. COLWIN) 



25 



