NOGUCHI 



PLATE 31 



10 



V is . 



'&-^ 



Ovolysis Elggs of Asteria vulgaris. 



1, Normal unfertilized egg. 2, Action of I per cent Cobra or 2 per cent Moccasin venom. 

 3, Result of complete Ovolysis by these venoms in 6 hours. 4, Action of 2 per cent 

 Crotalus venom in 6 hours. 5, Normal egg with polar body formation. 6, Ovolyiu 

 by venom. 7 to 15, Ovolytic effects of venom upon fertilized eggs. 



(Drawings by Noguchi.) 



