SPRATT, N. T., Jr. Ph.D., Prof. — Dept. of Zool., Coll. of Biol. Sci., Univ. of Minnesota, 



MINNEAPOLIS, Minn. 55455, U.S.A. • 



a Nutrient requirements essential to morphogenesis and growth in pre-streak and streak 



blastoderms. Gallus domesticus (Aves) 

 b Survey of dehydrogenase enzymes in early embryos: 1. localization of enzyme activity; 



2. structural integrity and enzyme activity. Same species as a 

 c Cytology of the developmental center (organizer) . Same species as a 



d Mechanism of morphogenetic movements (time-lapse cinematography). Same species as a 

 e Dynamic population pattern formation by free-swimming organisms. Tetrahymena spec. 



(Ciliata), Euglena spec. (Euglenophyceae) , Avbacia punctulata (Echinoidea) 

 f Integrative mechanisms in early development. (Aves) 

 g Role of the microenvironment in cell differentiation. (Aves) 



SPREY, Th. E. M.Sc. — Zool. Lab., Univ. of Leiden, Kaiserstr. 63, LEIDEN, Netherlands 

 a Differentiation and development of imaginal discs: 1. histochemistry; 2. biochemistry, 



especially proteins (electrophoresis) ; 3. cell death; 4. ultrastructure of leg disc; 5. i n 



vitro culture of imaginal disc cells (specific adhesion) . Calliphora erythrocephala 



(Diptera) 

 SRB. V. — Dept. of Biol., Charles Univ., Simkova 870, HRADEC KRALOVg, Czechoslovakia 

 SREBRO, Z. M.D., Ph.D. — Dept. of Biol, and Embryol., Acad, of Med., ul. Kopernika 7, 



KRAK6W, Poland 

 a X-ray induced congenital malformations and their protection by serotonin. Rattus spec. 



(Rodentia) 

 STAAL, G. B. Dr., Ir. — Zoecon Corp., 975 California Ave., PALO ALTO, Calif. 94304, 



U.S.A. 

 a Influence of insect hormones and synthetic analogs on metamorphosis, reproduction, and 



embryogenesis. (Orthoptera, Homoptera, Coleoptera, Lepidopteca, Diptera) 

 STAGNI, Miss A. Dr., Prof. — Inst, of Zool., Fac. of Sci., Univ. of Bologna, Via S.Giacomo 



9. 40126 BOLOGNA, Italy 

 a Sex determination and sex differentiation. Chlorohydra viridissima (Hydroidea) 

 b Cytochemistry and electron microscopy of oogenesis and spermatogenesis. Same species 



as a 

 c Cytometry, cytochemistry, and biochemistry of nucleolus during oogenesis. Spirorbis 



pagenstecheri (Serpulidae, Polychaeta) 

 d Inhibition by antibiotics of steroid hormone-induced sex-reversal in tadpoles. Rana dalma- 



tina (Anuva) 

 STAMPA (DI CASTRO), Mrs. M. Dr.Biol.Sci. — 1st. di Zool. dell'Univ., Viale Regina 



Elena 324 (al Policlinico), 00100 ROMA, Italy 

 STANGE, Miss L. Dr.rer.nat, Prof. — Inst, fur Bot, Techn. Univ., Herrenhauser Str. 2, 3 



HANNOVER, W.Germany 

 a Regeneration; activation of nucleic acid metabolism during cell dedifferentiation. Rhiella 



helicophylla (Hepaticae) , prothallia (Filicinae) 

 b Effects of growth regulators on meristems. Same species as a 



STANISSTREET, M. B.Sc. — Dept. of Zool., Univ. of Liverpool. LIVERPOOL, England 

 a Protein changes during early development (immunology, electrophoresis). Xenopus laevis 



(Anura) 

 b The sensitivity of embryos to maternal antibodies and of lymphocytes against the paternal 



strain in vivo and in vitro. (Mammalia) (with E. M. DEUCHAR, Bristol) 

 STAPLES, R. E. Ph.D. — Natl. Inst, for Environm. Health Sci., P.O.Box 12233, RESEARCH 



TRIANGLE PARK, N.C. 27709, U.S.A. 

 a Zygote development (physiological, biochemical). Oryctolagus cuniculus (Lagomorpha), 



Rattus norvegicus, Mus musculus (Rodentia) 

 b Teratology. Oryctolagus cuniculus (Lagomorpha), Rattus norvegicus, Mus musculus, 



Mesocricetus auratus (Rodentia) 

 c Effects of combinations of factors (e.g. drug and stress) on development, from gamete to 



adult (morphology, biochemistry, behaviour) . Mammalia 

 STARCK, D. Dr.med., Prof. — Dr. Senckenberg Anat. Inst., Med. Fak. der Univ., Ludwig- 



Rehn Str. 14, FRANKFURT/Main-Sud. W.Germany • 



STARK, E. — Inst, of Exper. Med. of the Hung. Acad, of Sci., Morphol. Dept., Szigony u 43, 



BUDAPEST VIII, Hungary 

 a Fine structure and hormonal activity of intact and cultured embryonic adrenal cells of 



different species 

 STARRE, H. van der Drs.biol. — Dept. of Med. Anat. and Embryol., State Univ. of Utrecht, 



Tanskerkhof 3A, UTRECHT, Netherlands 

 a Eye lens induction in vitro. Gallus domesticus (Aves) 

 b Histochemistry of eye lens inductors. Same species as a 

 STARRE (VAN DER MOLEN), Mrs. L. G. van der M.Sc. — Zool. Lab., Univ. of Leiden. 



Kaiserstr. 63, LEIDEN, Netherlands 

 a Ultrastructure and histochemistry of embryogenesis. Calliphora erythrocephala (Diptera) 

 Sf ASTN?, F. M.D. — Lab. of Embryophysiol., Inst, of Physiol, Charles Univ., Albertov 5, 

 PR AH A 2, Czechoslovakia 



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