nib. 8. 



152 Hlb. 11. 



The particular emphasis has been on the response of 

 melanoblasts to these hormones and the role of epider- 

 mis in conditioninq this response. Gallus domesticus. 



J. P. TRINKAUS 



9. Nervous system, ganglia, nerves and enveloping membranes. 



Central nervous system. 

 M. Correlation of morphological, physiological and bio- Ilia. 9. 



chemical differentiation of fetal cerebral cortex. Guinea 



pig, L. B. FLEXNER 



M. Factors responsible for the changes in brain metabolism 



durinq its development. Rat and guinea pig. 



D. B. TYLER 

 J. Development of cholinesterase in the Amphibian ner- Ilia. 9. c. 



vous system in relation to the functional maturation of 



various regions. Amblystoma punctatum. 



E. J. BOELL and S. C. SHEN 

 J. Cholinesterase in brain hyperplasia and hypoplasia Ilia. 9c. 



following eye transplantation and extirpation. Ambly- 

 stoma punctatum and Amb. tigtinum. 



E. J. BOELL and S. C. SHEN 



Accessory organs. 

 J. Function of the paraphysis cerebri in Amblystoma 1. 9. 



mexicanum. J. ARIfiNS KAPPERS II. 9. 



L. Development of paraphysis in birds and the circulation 1.9. 



of the cerebrospinal fluid. Gallus. II. 9. 



H. L. LANGEVOORT 



10. Special sense-organs (nasal organ, eye and ear). 



D. Biochemical studies of the eye pigments in Drosophila 

 melanogaster. CI. W. CLANCY 



V. Biochemical Embryology: Serological investigations 

 about development of organ-specific substances (lens 

 of the eye). Rana and chicken. G. ten CATE 



//. Embryonic temporary endo- skeleton, skeleton, skull and joints. 



V. Researches on the time of appearing of lipoids in the 

 embryonic cartilages. 



L. BEREK, I. NAGY and Gy. SAVAY 

 V. The mechanism of deposition of phosphorus and other 

 mineral components of bones and teeth, as revealed 

 with the help of radioisotopic tracers and the "coated 

 autograph" technique. White Rat. the Golden Hamster 

 (Cricetus aureus), the Frog tadpole. Small reptiles of 

 the order Squamata are also to be used shortly. 



L. F. BELANGER 

 L. Influence of vitamin D. on the calcification of develop- 

 ing bone-tissue in explants. Gallus domesticus. 



C. H. HOGEWONING 



