CHAPTER IX. 
POISONS. 
1. Chloroform.—My observations with regard to 
the distribution of nerves in Sarsia led me to in- 
vestigate the order in which these connections are 
destroyed, or temporarily impaired, by anesthetics. 
The results, I think, are worth recording. In 
Sarsia the following phases always mark the 
progress of anzesthesia by chloroform, etc.—1. Spon- 
taneity ceases. 2. On now nipping a tentacle, 
pulling the manubrium, or irritating the bell, a 
single locomotor contraction is given in answer to 
every stimulation. (In the unanesthesiated animal 
a series of such contractions would be the result of 
such stimulation.) 3. After locomotor contractions 
can no longer be elicited by stimuli, nipping a 
tentacle or the margin of the bell has the effect of 
causing the manubrium to contract. 4. After stimu- 
lation of any part of the nectocalyx (including 
tentacles) fails to produce response in any part of 
the organism, the manubrium will continue its re- 
sponse to stimuli applied directly to itself. 
2. Nitrite of Amyl—On Sarsia the effect of this 
