1.3. 116 1.8. 



M. The placenta of Tupaia javanica. 



C. J. van der HORST 

 M. Plnccntation-study of vascular pattern of endometrium II. 3. 



throuqhout pregnancy. Macaca mulatta (Rhesus mon- 

 key). E. M. RAMSEY 

 M. Studies of placenta related to twinning and to conditions 

 of birth. (Three papers published). Homo. 



J. G. SINCLAIR 



4. Ovogenesis, spermatogenesis, structure of eggs and sperm, 

 maturation, oviposition, fertilization (activation, partheno* 

 genesis). 



C. Reproduction, Cytology in Rhabdocoela. F. PAPI 1. 2a. 



C. Fertilization, Pseudogamy, Cytology, Heredity in 



Planarians. Species of Tricladida. M. BENAZZI I. 2a. 



IIIc.2. 

 C. Fertilization and Cytology in Planarians. Species of 1. 2a. 



Dugesia ( Tricladida) . 



Mrs G. BENAZZI— LENTATI 

 C. Fertilization and Cytology in Planarians. Polycelis 1. 2a. 



nigra (Tricladida) N. G. LEPORI 



J. Oogenesis and vitellogenesis of various Amphibians. II. 4. 



(under direction of I. PASTEELS) Miss M. WITTEK 



K. Oogenesis of Reptiles. Lacerta vivipava. II. 4. 



(under direction of J. PASTEELS) Miss M. WITTEK 



M. The magnitudes of the pronuclei of fertilized ova. 



Albino mouse. S. PESONEN 



5. Cleavage. 



6. Gastrulation. 



J. Normal development of Xenopus laevis, especially 1. 7. 



gastrulation and neurulation (for a normal table of 



Xenopus laevis) (Anura). 



P. F. FLORSCHOTZ and P. D. NIEUWKOOP 

 M. Structure d'un oeuf humain au stade de la ligne primi- 1.3. 



tive. Origine du mesoblaste. Mode de formation du 



chorion villeux. W. BONIN 



7. Neurulation (including development of neural crest). 



Development of organ-systems. 



8. Skin, dermal formations (exo- skeleton, teeth, feathers), sense 

 organs and glands of skin (including mammae) and pigment 

 patterns. 



General subiects. 

 E. Factors involved in the development of the shell in the II. 8. 



mollusca. Paludina viviparus. Helix pomatia and Nucella 

 lapillus. Miss J. E. M. HEAYSMAN 



