82 



THE VENOMS OF CERTAIN THANATOPHIDE.E. 



The Actions of Venom Peptones on Animals in which the Pneumogastric Nerves 

 had been Oat. Four experiments were made with the peptone on animals the 

 pneumogastric nerves of which had been previously cut. In three of the four there 

 was a primary increase in the pulse, while in the fourth there was a temporary 

 diminution followed by a rise above normal. These experiments are in accord with 

 those made with pure venom, and indicate a greater tendency to primary pulse 

 frequency after section of the pneumogastric nerves. 



One of the above experiments was made with the peptone from the Crotalus 

 adamanteus ; one with the Ancistrodon piscivorus ; and two with the Cobra. 



REMARKS. 



Pneumogastric nerves cut. Injected intravenously the peptone 

 from 0.015 gram dried venom of the Crolalus adamanteus. 



Struggles. 



Struggles. 



Experiment No. 63. 



Time: 



Pulsations 



Normal 



min. sec. per minute. 



30 



40 

 50 

 00 

 20 

 40 

 00 

 30 

 2 40 



2 50 



3 00 



4 20 



295 

 315 

 315 

 310 

 310 

 315 

 320 

 330 

 310 

 102 

 150 

 240 



Killed. 



REMARKS. 



Pneumogastric nerves cut. Injected intravenously the peptone, 

 from 0.015 gram dried venom of the Ancistrodon pisci- 

 vorus. 



Dead. 



