II. EXPERIMENTAL DEVELOPMENTAL MORPHOLOGY 



SUBDIVISION 



1 Theoretical problems and general questions 



2 Methods and techniques 



3 General subjects (asexual development, reproduction, etc.) 



4 Initial development 



a General subjects 



b Primordial germ cells 



c Gameto-, ovo- and spermatogenesis 



d Maturation 



e Ovulation and oviposition 



f Activation and fertilization 



g Parthenogenesis 



5 Cleavage and mitosis 

 a Cleavage 



b Mitosis 



6 Further development o[ Invertebrates 



a General subjects (including complete development) 

 b ,,Primitiventwicklung" 

 c Induction and determination 

 d Development of part of the organism 

 e Development of special organ systems 

 (Cf. general subdivision p. 173 — 175) 

 f Histo- and cytogenesis 



7 Further development of Vertebrates 



a General investigations 



1 General subjects 



2 Complete development 



3 Partial development 



4 Implantation and placentation 

 b ..Primitiventwicklung" 



1 Early development 



2 Gastrulation and formation of germ layers 



3 Neurulation 



4 Formation of neural crest 



5 First larval development 

 c Induction and determination 



1 Induction 



2 Determination 



3 Regulation and organization 



d Development of part of the organism 



1 Head 



2 Extremities 



3 Tail 



e Development of special organ systems 

 (Cf. general subdivision p. 173 — 175) 

 f Histo- and cytogenesis 



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