II. 1. 123 II. 2a. 



II. Comparative embryology. 



la. Theoretical problems. 



V. Some aspects of the problems of homology (with sp. ref. 

 to the bicentenary of the birth of GOETHE). Verte- 

 brates. G. R. de BEER 



V. New embryological evidence of the "biogenetic law" in 

 connection with the phenomenon of iteration and con- 

 vergence, rudimentation and adaptation. Vertebrates. 



H. STEINER 



lb. Technics. 



lc. General questions. (Induction, determination, regulation, or- 

 ganization, symmetry and asymmetry, gradients). 



M. Relations between organweight and bodyweight in II. 19. 



ontogeny. Various mammals. J. MOLL 



2a. Complete development or development during special periods 

 (e.g. early, late, etc.) of whole organism. 



EV. + V. The general comparative, descriptive and experi- I. 2a. 



mental embryology of the Metazoa and their classifi- Ilia. 2a. 

 cation. The place of the Cycloneuria (Echinoderma, 

 Enteropneusta, Pterobranchia and Chaetognatha) in the 

 animal kingdom. G. VANDEBROEK 



EV. + V. Comparative organogenesis in Protostomes and 1. 2a. 



Chordates. G. VANDEBROEK 



EV. -f- LV. Morphogenetic movements during gastrulation of I. 2a. 



Coelenterata, Enteropneusta and lower Chordates. 



G. VANDEBROEK 



C. "The development of Dasybranchus caducus (Poly- 1. 2a. 



chaeta) from egg to pre-adult". Egg deposition, culture 

 methods, day to day observations and records of living 

 larvae and juveniles, study of fixed material. 



C. G. BOOKHOUT 



C. Embryology and development of Haploscoloptos bustoris I. 2a. 

 (Polychaeta) . G. C. BOOKHOUT and E. C. HORN 



D. Cytochemical observations on oogenesis and develop- 1. 2a. 

 ment of Insecta. Acanthocelides (Cl) and Drosophila II. 4. 

 (Dipt.). J. MULNARD 



E. Untersuchungen iiber Larvenentwicklung mariner Gas- 1. 2a. 

 tropoda (Prosobranchia) . A. PORTMANN 



V. Untersuchungen iiber embr. und postembryonale Entw. I. 2a. 



der Wirbeltiere, vor allem postembryonale Phase. 



Vertebraten, vor allem Vogel. A. PORTMANN 



J. Development of Leiopelma archeyi and Ascaphus truei I. 2a. 



(Amphicoelous Anura). N. G. STEPHENSON 



K. General survey of Turtle development. Chrysemis, Pseu- I. 2a. 



demys and Chelone. J. J. PASTEELS 



