348 



Transactions. 



Control to the above fishes under the same conditions (200 c.c. fluid) 

 showed symptoms of asphyxiation in 4 hours, and the fishes in tutin and picrotoxin 

 died practically in order of their weights. 



* Fish used In this experiment was Cheimarrichthys fosteri. 

 fatal to three minnows. 



Tutin solution, 0-003 per cent., was not 



