Sedra 80 Shaver 



b. Stages in the normal development of Bufo regularis. (Amphibia) 



c. Metamorphosis of the jaws and their muscles correlated with the changes 

 in the animal's feeding habits. Bufo regularis (Amphibia) 



d. The development of skull and visceral muscles of Xenopus laevis during 

 metamorphosis. (Amphibia) (Normal Table) 



SEIDEL. F. Dr Phil., Prof. — Max Planck-Inst. f. Tierzucht und Tier- 

 ernahrung, (20a) Mariensee iib. Neustadt a. Rubenberge, (Britische 

 Zone), Deutschland. 



a. Morphologische und physiologische Untersuchungen an der embryonalen 

 Entwicklung von Wirbeltieren. Kaninchen (Mammalia) 



b. Morphologische und physiologische Untersuchungen an der embryonalen 

 Entwicklung von Insecten. Platycnemis und Gryllus (Hexapoda) 



SEMBRAT, K. Ph.D., Prof. — Inst. Zool. Uniw. we Wrodawiu, Zaklad 

 Zool. Ogolnej, ul. Sienkiewicza 21, WROCLAW. Polska (Poland) 



a. Experimental analysis of the early developmental stages of the Sea 

 Anemones. Sagartia leucolena ( Anthozoa) 



b. Localization of the primary gonocytes in the early gastrula of Amphibians. 



c. The morphogenetical functions of the thyroid gland in poikilothermic 

 Vertebrates. (Pisces, Amphibia and Reptilia) 



d. Early developmental stages in the rat. Epimys norvegicus (Mammalia) 

 SEMBRATOWA. Z. M.D., Prof. — Zaklad Histol. i Embryol. Uniw. 



Wroclawskiego, ul. Chalubinskiego 6a, WROCLAW, Polska (Poland). 



a. Heteroplastic transplantation of the hind part of neural plate. Amblystoma 

 punctatum and A. tigrinum (Urodeles) 



b. Analysis of the hind part of the neural plate in Anura. Rana palustris 

 and R. silvatica. 



c. Early developmental stages in mammals, (in collaboration with M. 

 RADKOWA) 



SENSENIG, E. C. B.A.. M.S.. Ph.D., Prof. — Schools of Med. and Dent., 

 Med. Center of the Univ. of Alabama, 620, South 20th Str., BIRMING- 

 HAM 5, Ala., U.S.A. 

 (no data received over this year) 



SHANER, R. F. Ph.D., F.R.S.C, Prof. — Dept of Anat. Univ. of Alberta, 

 Med. School, EDMONTON, Alberta, Canada. 



a. A study of abnormal hearts in pig embryos corresponding to the third 

 month of human development. (Mammalia) 



b. Study of abnormal pig embryos in relation to the cause of complete 

 and corrected transposition of the great vessels and ventricles of the 

 heart. Sus scrofa (Mammalia) 



c. Study of a collection of abnormal pig embryos of an age corresponding 

 to the third month of human development with the aim of throwing light 

 on the development of various human abnormalities. Sus scrofa (Mam- 

 malia) 



SHAPIRO, H. B.S., A.M., Ph.D., Prof. — Marine Biol. Lab., WOODS 

 HOLE, Mass., U.S.A. 

 (no data received over this year) 



SHAVER, J. R. A.B., Ph.D. — Dept of Zool., Univ. of Missouri, COLUM- 

 BIA, Mo., U.S.A. 



a. Initiation of artificial parthenogenesis in frog eggs. Rana fusca (Anura) 



b. Immunological characteristics of embryonic cytoplasmic granules. Rana 

 fusca (Anura) 



