[lie. 1. 158 IIIc.2. 



IIIc. Experimental embryology 



Development and genetics. 

 la. Theoretical problems, 

 lb. General questions. 



The role of the macronuclei. Ciliata. P. B. WEISZ 

 C Phanotvpische Geschlechtsbestimmung. Planaria (Tut- 1.17. 



hell). ' H. NUESCH 11.17. 



D. Influence of maternal environment and cytoplasm of Illb. 2a. 

 female-sterile mutants on egg development. Mode of 

 action of the "fused" factor on development. Droso- 

 phila melanog aster. R. A. BEATTY 



D. Development of imaginal discs, for the study of the cell Ilia. lc. 

 size in different developmental conditions. Drosophila 

 (Insects). M. C. CASTIGLIONI 



E. Phanotvpische Geschlechtsbestimmung. Limnaea 1.17. 

 (Gastr.). H. NOESCH 11.17. 



E. Nahreidetermination bei stenoglossen Prosobranchier~ Illb. lc. 

 Arten. H. STOIGER 



M. Study of intra-uterine influences upon embryonic Ilia. 19. 

 growth, differentiation, and organogenesis by means of 

 ova and ovary transplants between races known to 

 differ genetically in adult body size as determined by 

 the general size factors and also by genetic factors 

 affecting specific regions of the axial skeleton. Orycto- 

 lague cuniculus. 



F. AVIS, D. DIETZ and P. B. SAWIN 



2. General genetical studies (heteroploidy, hybridization, chimae~ 

 ras, etc.). 



General subjects. 

 D. Influence of maternal environment and cytoplasm on Illb. 17. 

 development of Drosophila; repeated transplantation of 

 embryonic gonads between species. Drosophila buzzati 

 and D. arizonensis (Insecta). M. FISCHBERG 



D. Developmental study of lines selected for large and 

 small body size in Drosophila melanogaster (Insecta). 



E. C. R. REEVE and F. W. ROBERTSON 

 Morphological and experimental investigation of coiling Ilia. lc. 

 in Limnea pevegra. F. M. HISLOP 



E. Cytologic und Cytogenetik der Prosobranchier. 1. 2a. 



H. STOIGER 

 H. The development of Ascidian hybrids. 



A. MINGANTI 



L. The development and inheritance of abnormalities of Hid. 4. 



the aortic arches of the chick and their relation to 

 hatching. Gallus domesticus. M. D. FROUD 



