X LIST OF PLATES 



Facing 

 Page. 



Plate 29. Effect on White and Red Corpuscles of Rabbit: A, Crotalus Venom, 0.5 per cent; 

 24 hours at 37 C. B, Cobra Venom, 0.5 per cent 5 minutes at 37 



C. C, Cobra Venom, 0.5 per cent; 20 minutes at 37 C 170 



Plate 30 202 



Figs, i to 4. Eggs of Arbacia punctulata : i, Normal. 2 to 4, Different stages 



of Ovolysis caused by i per cent Cobra Venom in sea-water. 

 Figs. 5 to 8. Eggs of Lepidonatus squamatus: 5, Normal. 6 and 7, Different 

 stages of Ovolysis caused by i per cent Cobra and 2 per cent 

 Crotalus Venom, showing no real Ovolysis, but peculiar Retraction 

 of Deutoplasm. 



Figs. 9 to 1 1. Pluteus stage of Arbacia punctulata: g, Normal, active pluteus. 

 10, Pluteus under the effect of 2 per cent Cobra Venom, n, Dis- 

 integration under the effect of same venom. 



31. Ovolysis, Eggs of Asteria vulgaris : i, 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 for- 

 mation. 6, Ovolysis by venom. 7 to 15, Ovolytic effects of venom 

 upon fertilized eggs 202 



32. A, Young Agar Culture of Bacillus anthracis. B, C, and D, Young Cultures 



of B. anthracis on Venomized Agars 206 



33. A, Cross-section of Pectoral Muscle of Normal Pigeon. B, Cross-section of 



Pectoral Muscle of Pigeon which died from effect of venom of Crotalus 

 adamanteus. C, Longitudinal section of Pectoral Muscle of Pigeon 

 which died of Crotalus Venom poisoning. D, Cross-section of Normal 

 Muscle of Thigh of Frog. E, Cross-section of Venomized Muscle of 

 Thigh of Frog 208 



