
NOGUCHI PLATE 31 

Ovolysis—Eggs of Asteria vulgaris. 
1, Normal unfertilized egg. 2, Action of | per cent Cobra or 2 per cent Moccasin venom. 
» 3, Result of complete Ovolysis by these venoms in 6 hours. —_ 4, Action of 2 re cent 
° 
Crotalus venom in 6 hours. 5, Normal egg with polar body formation. 6, lysis 
by venom. 7 to 15, Ovolytic effects of venom upon fertilized eggs. 
(Drawings by Noguchi.) 
