Stef 86 Stich 



STEFANELLI, A. Dr, Prof. — 1st. di Zool.. Univ. di Stato, Viale S. 



Bartolomeo 1, CAGLIARI, Sardegna, Italia. 



(no data received over this year) 

 STEINER. H. Ph.D., Prof. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. 



ZiJrich, Kiinstlergasse 16, ZURICH 6, Schweiz. 



a. Development of the tetrapod-limb with special reference to mammals 

 (embryological evidence of their arboreal origin). (Amphibia, Reptilia, 

 Aves and Mammalia) 



b. New embryological evidence of the "biogenetic law" in connection with 

 the phenomenon of iteration and convergence, rudimentation and adap- 

 tation. (Vertebrata) 



c. Embryological analysis of feather-growth. The problems of the "after- 

 schaft" and of "diastataxy". (Ratites and Carinatae. Aves) 



d. Colour and pigment-differentiation in the feather. Melopsittacus un- 

 dulatus (Aves) 



STEINERT, M. Lic.Sc. Zool. — Lab. de Morphol. anim., Fac. des Sci., 

 Univ. libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES- 

 Auderghem, Belgique. 



a. Studies on nucleic acids synthesis during morphogenesis. (Amphibia) 

 (in collaboration with R. THOMAS) 



b. Action of specific nucleic acids on morphogenesis. (Amphibia) (in col- 

 laboration with R. THOMAS) 



c. Etude des purines hbres dans I'embryon. Rana, Pleutodeles, Ambystoma 

 (Amphibia) 



STEPHAN, Fr. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. 

 d'Embryol. et Teratol. exper. du C.N.R.S., Institut de Zool. et de Biol, 

 generale, 12 Rue de I'Llniversite, STRASBOURG, France. 



a. Formation du systeme vasculaire extraembryonnaire et son extension. 

 Developpement du coeur et des gros troncs arteriels de I'embryon. Gallus 

 domesticus (Aves) 



b, Etude experimentale des anomalies et des suppleances vasculaires dans 

 I'aire extraembryonnaire et I'embryon. Gallus domesticus (Aves) 



STEPHENSON, N. G. M.Sc. — Auckland Univ. Coll., NEW ZEALAND. 

 a. Observations and experiments on development. Leiopelma hochstetteri 



(Anura) 

 h. The development of the appendicular skeleton. Leiopelma archeyi and 

 Ascaphus truei (Anura amphicoela) 

 STEVENS, L. C. Grad. stud. — Dept of Biol., Coll. of Arts and Sci., Univ. 

 of Rochester, ROCHESTER 3, N.Y., U.S.A. 

 a. Developmental potencies of the neural crest. Xenopus laevis, Rana 



pipiens (Anura) 

 h. Origin of melanophores and guanophores. Xenopus laevis, Rana pipiens, 

 Rana sylvatica, Rana palustris and Bufo americanus (Anura) 

 STEVENSON. J. P. B.Sc. — Dept of Zool. and Comp. Anat., Univ. Coll. 

 London, Gower St, LONDON W.C. 1, England (U.K.) 

 a. Investigation into the techniques of culturing tissues. Philosamia cynthia 

 (Lepidoptera) 

 STEYN, W. J. M.Sc. — Aarbossiesplaat, BURGERSDORP ( C. P. ) , South- 

 Africa, (no embryological work in progress) 

 STICH, H. Drrer. nat. — Max Planck Institut, WILHELMSHAVEN, 

 Deutschland. 



