Plate 33 



D 



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. (Photomicrographs.) 



