b. Determination of neural plate. Triton spec, Ambystoma spec. (Urodela) 



c. Neural crest development. (Amphibia) 



d. Steroids during development (chemical detection). (Amphibia) 

 RAVEN, Chr. P. Dr.Sc. F.I.I.E., F.R.A., Prof. — Zool. Lab., State Univ. of 



Utrecht, Janskerhof 3, UTRECHT. Netherlands 



a. Maturation divisions of eggs. Various spp. (Gastropoda) 



b. Influence of centrifuging on development. Limnaea stagnalis (Gastropoda) 



c. Application of information theory to oogenesis and embryonic develop- 

 ment. 



RAWLES (SPURBECK), Mrs. M. E. Ph.D., M.I. I.E. — Dept. of Embryol., 

 Carnegie Inst, of Washington, 115 W. University Parkway, BALTI- 

 MORE 10. Md., U.S.A. 

 a. The origin and development of regional specialization in the integumentary 

 system. Gallus gallus (Aves) 



RAWLS, J. M. B.S., M.A., Ph.D., Prof. — Dept. of Biol., Lamar State Coll. 

 of Technol., BEAUMONT, Tex., U.S.A. 

 a. Sperm enzyme activity. Mellita quinquiesperforata (Clypeastroidea, Echi- 

 noidea) 



RAYNAUD, A. Dr.es Sci., M.I. I. E. — Inst. Pasteur de Paris, Annexe de 

 Sannois (Service d'Embryol. exper.), Butte des Vieux Moulins, SAN- 

 NOIS (S. & O.), France 



a. Etude du developpement normal du tractus genital chez rembryon. An- 

 guis fragilis (Lacertilia) 



b. Effets de la destruction au moyen des rayons X, des ebauches hypophy- 

 saires. Anguis fragilis (Lacertilia) 



c. Etude de l'orientation de l'axe de symetrie embryonnaire et des rapports 

 existant entre cette orientation et la rotation des oeufs dans l'uterus. An- 

 guis fragilis (Lacertilia) 



d. Researches on the formation and the regression of the limb buds. Anguis 

 fragilis (Lacertilia) 



e. Histogenesis of the adrenal gland. Anguis fragilis (Lacertilia) 



f. Decapitation of the embryo. Anguis fragilis (Lacertilia) 

 RAYNAUD (CHAULIN-SERVINIERE), Mrs. J. Dr.es Sci. — Inst. Pas- 

 teur de Paris, Annexe de Sannois (Service d'Embryol. exper.), Butte des 

 Vieux Moulins, SANNOIS (S.6 0.), France 



a. Histochemical researches on the functional differentiation of the endocrine 

 glands in the embryo. Anguis fragilis (Lacertilia) 

 REAMS, W. M., Jr. B.S., Ph.D. — Dept. of Zool., Louisiana State Univ., 

 BATON ROUGE 3, La., U.S.A. 



a. Effects of tissue environment on pigment cell morphogenesis. Gallus 

 domesticus (Aves), Mus musculus (Rodentia) 



b. Factors affecting pigment cell behaviour in the skin. Gallus domesticus 

 (Aves) , Mus musculus (Rodentia) 



c. Microchemical analysis of myogenesis and mysial differentiation. Gallus 

 domesticus (Aves), Mus musculus (Rodentia) 



REGGI, L. M. de — Lab. de Zool. exper., Fac. des Sci. de Lyon, 43 Bd. de 

 l'Hippodrome, VILLEURBANNE, France 

 a. Variations morphologiques et physiologiques dans le developpement, sous 

 Taction de divers facteurs. (Phytophthires, Rhynchota) 



133 



