196 



EFFECT OF C E NTR I F UGAT I ON ON DEVELOPMENT 



TABLE II: CENTRIFUGATION_ 



.X GRAVITY 



Some of the types of abnormalities produced "by centrifugation are: depigmentation, 

 permanent blastulae; inhibition of gastrulation, anaxlal and hypaxlal conditions, doubl- 

 ing of embryos, spina bifida, head defects, and accessory appendages. These should be 

 photographed or sketched below, always with a record of the stage and conditions of cen- 

 trifugation. 



DRAWINGS AND PHOTOGRAPBS OF ABNORMALITIES FOLLOWING CENTEIFUGATION 



