88 



THE VENOMS OF CERTAIN THANATOPHIDEJE. 



Experiment No. "I. 



Normal 



Time: 

 min. sec. 



5 

 10 

 20 

 30 

 40 

 00 

 00 

 30 

 30 

 8 00 



8 30 



9 00 



10 00 



Experiment No. 8. 



Normal 



Time: 

 min. sec. 



20 

 30 

 40 

 00 

 30 

 50 

 10 



1 

 1 



1 



2 



2 30 



3 00 



4 00 



Experiment No. 9. 



Normal 



Time: 

 min. sec. 



10 

 20 

 30 

 00 

 30 

 00 

 30 

 00 

 00 

 30 

 35 

 45 



1 

 1 



2 



2 

 3 

 5 

 5 



5 

 5 



6 05 

 6 15 

 6 25 



6 45 



7 05 



Pressure 

 m. m. 

 110 

 76 

 76 

 . 78 

 70 

 60 

 44 

 42 

 40 

 36 

 32 

 26 

 20 

 10 



Pressure 

 m. m. 

 138 



64 



74 

 84 

 76 

 60 

 74 

 74 

 84 



Pressure 

 m. in. 

 134 

 108 

 72 

 70 

 70 

 72 

 74 

 70 

 70 

 70 

 68 

 76 

 70 

 60 

 62 

 66 

 60 

 52 



Injected intravenously 0.015 gram dried venom of the Cro- 

 talus horridus dissolved in 1 c. c. distilled water. 



Animal broke loose from mouth-piece, and was firmly held 

 and refixed. 



Dead. Respiration failed before the heart. 



Injected intravenously 0.004 gram dried venom of the Ancis- 



Irodon piscivorus dissolved in 1 c. c. distilled water. 

 Convulsions. 



Injected as above. 



Struggles. 



Killed by pithing. 



Injected intravenously 0.004 gram dried venom of the Ancis- 

 trodon piscivorus dissolved in 0.5 c. c. distilled water. 



Injection repeated as before 



Convulsive movements. 



