Plate 27 



A. Haemorrhage caused by venom of Crotalus adamanteus on the mesentery of Guinea-pig 

 Showing one large and two smaller ruptures of Capillary Vessel. Picture shows be- 

 ginning of haemorrhage. X 1000. 



B. Haemorrhage caused by venom of Crotalus adamanteus on the mesentery of Rabbit. 



Showing defect of Capillary Vessel wall caused by disappearance of an Endothelial Cell. 



C. Haemorrhage in mesentery caused by Crotalus Venom in Rabbit. X 200. 



