III. 8b 



IV. 2a 



9 Nutrition o[ embryo 



(Invertebrates and Vertebrates) 



IV. DEVELOPMENT AND GENETICS 



SUBDIVISION 



1 Theoretical problems and general questions 



2 General genetical studies 

 a General studies 



b Heteroploidy 

 c Hybridization 

 d Chimaera 

 e Merogony 



3 Analysis of influence of special genes and mutants 

 a Special genes and mutants 



b Lethal factors 



4 Phenocopies 



CHARACTER OF INVESTIGATION 



(1) Metabolism and respiration 



(2) a) Biochemistry, b) Histochemistry, c) Cytochemistry 

 (4) Physical treatment 



(6) Influence of hormones and vitamins 



1 Theoretical problems and 

 general questions 



Landauer, W. — e 

 Runner, M.N. — d 



2 General genetical studies 

 a General studies 

 Callan, H. G. — a 

 Finger, I, — a 

 Benazzi, M. — a 



185 



