

Ilia. 2b. 131 Ilia. 2b***. 



Tail. 



J. Heteroplastic transplantation of the hind part of neural Illb. 2b. 

 plate. Ambijstoma piinctatum, A. tigrinum (Urodeles) . 



Z. SEMBRATOWA 

 J. Analysis of the hind part of the neural plate in Rana 

 palustris and R. silvatica (Anura). 



Z. SEMBRATOWA 

 J. Investigations concerning the process of outgrowth of Illb. 2b. 

 the tail in Amphibia with special reference to the role 

 of the chorda dorsalis and the tail mesoderm. Amblysto- 

 ma mex., Triton taen. and Xenopus laev. 



J. H. BIJTEL 



2b*. Complete development or development during special periods 

 (e.g. early, late, etc.) of isolated blastomeres. 



H. Development of isolated blastomeres of the Ascidian 

 egg. A. PISANO 



H. Fusion of blastomeres. Ascidians. S. LEGHISSA 



H. The organization of Ascidian embryos studied by the Ilia. 2a. d. 

 influence of centrifugation; a. action on isolated parts; 

 b. local action of centrifugation (recombination after 

 centrifugation) G. VANDEBROEK 



G. Large scale separation of macromeres, mesomeres and Illb. lb*, 

 micromeres of the developing sea urchin egg. 



P. E. LINDAHL 



2b** . Complete development or development during special periods 

 (e.g. early, late, etc.) o[ organ rudiments. 



J. Vital staining of mesoderm and endoderm under the 1. 2b.** 

 hindbrain and ear. Amblystoma punctatum. 



S. WILENS 



J. Experimental study of the origin and relation to sur- I. 2b.** 

 rounding tissue of the notochord in Amphibia. Triton 

 alpestris. S. MOOKERJEE 



J. Lateral mesoderm explants in tail bud stage. Anura. Illb. 2b.** 



L. RAUNICH 



HV. Prospective areas in the chick and rabbit blastoderms. 



W. BUNO and C. M. FRANCHI 



M. Transplantation of early mammalian embryonic rudi- 

 ments. Cricetus auratus. M. W. JOHNSON 



M. Continued investigation by homologous and hetero- II Id. 2. 



logous transplantation of embryonic material relating to 

 its development in the anterior chamber in the eye using 

 the method developed by H. S. N. GREENE. Material 

 from human fetuses as well as Guinea pigs and mouse 

 embryos will be used. B. L. NEWTON 



2b*** . Complete development or development during special periods 

 (e.g. early, late, etc.) of special tissues. 



