Schrcibcr-Sha 



a Quantitative cytology: nuclear size and number of ..nucleolar units". 



Bufo spec. (Anura), Gallus spec. (Aucs), Mus rattus (Rodentia) 

 h Interscxualitv Bothrops insularis Amand (Ophidia) (in collaboration 



with A. HOGE, Sao Paulo and H. BELLVOMINI. Sfio Paulo) 

 SCHREURS A F. B.Sc. — Hubrecht Lab.. Intern. Embryol. Inst., Jans- 



kerkhof'2. UTRECHT. Holland 



a. Analysis of competence of ectoderm for neural induction with various 

 experimental techniques. Ambystoma mexicanum (Urodela) 



b. Interaction of patterns in neural plate and underlying archenteron roof 

 after rotation of the neural plate through 180°. Ambystoma mexicanum 

 (Urodela) 



SCHRODER, R. K. P. Dr Med. — Anat. Inst, der Univ. Hamburg, Schott- 

 miillerstr. 1, HAMBURG 20. Deutschland 



— z.Zt. Altonaer Krankenhaus. Abt. f. innere Medizin. HAMBURG 

 a. Fetal membranes. NANCY, France 



SCHWANDER, J. — Lab. de Physiol. Gener., 30, Rue Sainte-Catherine, 

 a. Recherches experimentales sur la chronologic du developpement biochi- 

 mique au niveau de I'cncephale. Gallus domesticus (Aves) (en collabora- 

 tion avec J. F. GAYET) 

 SCHWARTZ, V. Dr — Max Planck-Inst. fiir Biol.. Spemannstr. 34. 

 TUBINGEN. Deutschland 

 a. Ontogenese des Fliigelmusters. Plodia spec. (Lepidoptera) 

 SEDRA. S. N. B.Sc. M.Sc, Ph.D., F.Z.S. — Dept of Zool.. Alexandria 

 Univ.. Moharram Bey. ALEXANDRIA, Egypt 



a. Stages in normal development. Bu[o regularis (Anura) 



b. Seven interesting abnormal urostyles. Bu[o regularis (Anura) 



c. The development of the nasal capsules. Bu[o regularis (Anura) (in colla- 

 boration with M. I. MICHAEL) 



d. The ontogenesis of the vertebral column. Bu[o regularis (Anura) (in col- 

 laboration with A. A. MOURSI) 



e. The structure of the hyobranchial apparatus of the tadpoles. Bufo regu- 

 laris (Anura) (in collaboration with M. I. MICHAEL) 



f. The development of the columella auris. Bu[o regularis (Anura) (in 

 collaboration with M. I. MICHAEL) 



SEGAL. S. J. M.S., Ph.D., M.I. I.E. — Population Council, Rockefeller Inst. 



for Med. Research, 66th St and York Ave, NEW YORK 21, N.Y., 



U.S.A. 

 SEHE. Ch. T. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. 

 SEIDEL. F. DrPhil.. o.Prof. — Zool. Inst, der Univ., Ketzerbach 63, (16) 



MARBURG/Lahn, Deutschland 



a. Morphologische und physiologische Untersuchungen an der embryonalen 

 Entwicklung. Oryctolagus cuniculus (Lagomorpha) , Mus musculus (Ro- 

 dentia) 



b. Morphologische und physiologische Untersuchungen an der embryonalen 

 Entwicklung. Platycnemis spec. Calopteryx spec. (Odonata), Gryllus 

 spec, Dixippus spec. (Orthoptera) , Apis spec. (Hymenoptera) , Droso- 

 phila spec. (Diptera) . Ascaris spec. (Nematoda) 



SELMAN, G. G. Ph.D. — Inst, of Animal Genet., Univ. Dept of Genet., 

 King's Buildings, West Mains Rd, EDINBURGH 9, Scotland 

 a. Study of the effects of destroying the primary organisation of mosaic 

 and regulation eggs by ultrasonic treatment. (Invertebrata) 



98 



