of experimental material and devising new forms of physical experimentation. Marino- 



gammarus obtusatus (Gammaridae, Crustacea), Echinarachnius parma ( Echinoidea) , 



Rana pipiens (Anura) 

 RASCH (MYRBERG), Mrs. E. M. Ph.D., Prof. — Dept. of Biol., Marquette Univ., 530 



N. 15th St., MILWAUKEE, Wis. 53233, U.S.A. 

 a Atypical nucleoprotein synthesis during larval development. Sciara coprophila (Diptera) 

 b Cytochemistry and fine structural analysis of puffs in giant chromosomes. Same species 



as a 

 c Triploidy in a gynogenetic form. Poecilia formosa (Teleostei) 

 RASH J — Dept. of Embryol., Carnegie Inst, of Washington, 115 W.University Parkway, 



BALTIMORE, Md. 21210, U.S.A. 

 a Animal viruses (esp. tumor viruses) as tools in studying embryonic development. Gallus 



gallus (Aves) (with J. D. EBERT and C. W. ORR) 

 RAUNICH, L. Ph.D., M.D., Prof. — 1st. di Anat. Comp., Univ. di Ferrara, Via Scienze 



17, 44100 FERRARA, Italy • 



a Changes of hemoglobins and dehydrogenases during embryonic and postembryonic 



development (starch gel electrophoresis). Mugil spec, Chrysophrys spec, Labrax spec, 



Gasterosteus spec. (Teleostei) .«.«■'« 



RAVEN, Chr. P. Ph.D., Prof. — Zool. Lab., State Univ. of Utrecht, Janskerkhof 3, 



UTRECHT, Netherlands • 



a Application of information theory to oogenesis and embryonic development 

 b Cortical morphogenetic field and early ooplasmic segregation. Various spp. (Gastropoda) 

 c Transfer of information from egg follicle to oocyte. Various spp. (Gastropoda) 

 d Origin of dextrality and sinistrality. Lymnaea peregra (Gastropoda) 

 e Computer simulation of embryonic development, (with J. J. BEZEM) 

 RAWLES (SPURBECK), Mrs. M. E. Ph.D. — 4000 N.Charles St., BALTIMORE, Md. 



21218, U.S.A. «. , * 



RAYNAUD, A. Dr.es Sci. — Serv. d'Embryol. Exper., Inst. Pasteur, 20 rue des Mouhns, 



95 SANNOIS, France . • 



a Normal development of the genital tract in the embryo. Anguis fragilis, Lacerta viridis 



(Lacertilia); Tropidonotus tessellata, Vipera aspis (Ophidia) 

 b Destruction with x-rays of the primordium of the hypophysis. Anguis fragilis (Lacertilia) 

 c The rotation of the egg in the uterus and the orientation of the axis of the embryo. Anguis 



fragilis (Lacertilia) 

 d The development of the limb buds (Lacerta viridis, L. sicula) and the factors involved 



in the arrest of development of limb buds. Anguis fragilis (Lacertilia), Python reticulatus 



(Ophidia) 

 e Development of the phallus. Lacerta viridis, Anguis fragilis (Lacertilia), Tropidonotus 



tessellata (Ophidia), (Chelonia) 

 f The function of endocrine glands in the embryo. Same species as e 

 g Capacities of differentiation in vitro of genital tract primordia. Same species as a 

 h Effects of sexual and gonadotropic hormones on sexual differentiation of the embryo. 



Same species as e 

 i RNA and DNA synthesis of epidermal and mesodermal cells in the limb buds. Anguis 



fragilis, Lacerta viridis (Lacertilia) (with J. VASSE) 

 j The mechanisms of arrest of the elongation and of degeneration of Miillerian ducts in 



male embryos. Lacerta viridis (Lacertilia), Cistudo europaea (Chelonia) (with C. PIEAU) 

 RAYNAUD (CHAULIN-SERVINIERE), Mrs. J. Dr.es Sci. — Serv. d'Embryol. Exper., 



Inst. Pasteur, 20 rue des Moulins, 95 SANNOIS, France 

 a Histochemistry of the functional differentiation of the endocrine glands in the embryo. 



Anguis fragilis (Lacertilia) 

 b Culture in vitro of the primordium of the sub-maxillary gland. Mus musculus 



(Rodentia) 

 c Histochemistry of the limb bud. Anguis fragilis, Lacerta viridis (Lacertilia) 

 RAZEK, H. A. M.D. — Dept. of Anat., Div. of Appl. and Topogr. Anat., Univ. of Bern, 



26 Buehlstr., CH-3012 BERN, Switzerland 

 a Comparative placentation. (Mammalia) 



b Early differentiation of germ layers. Mus musculus (Rodentia) 

 REAMS, W. M., Jr. Ph.D., Prof. — Dept. of Biol., Univ. of Richmond, RICHMOND, Va. 



23173, U.S.A. 

 a Effects of tissue environment on pigment cell morphogenesis. Gallus domesticus (Aves), 



Mus musculus (Rodentia) 

 b Factors affecting pigment behaviour in the skin. Gallus domesticus (Aves), Mus musculus 



(Rodentia) 

 c The Langerhans cell: origin and differentiation. Mus musculus (Rodentia) 

 d Immunochemical studies on the origin of Langerhans cells. Mus musculus (Rodentia) 

 REBER (PELLE), Mrs. A. — Lab. de Physiol. Anim., Univ. de Rouen, 10 Bd. de Broglie, 

 76 MONT-SAINT-AIGNAN, France 



148 



