C. M. CHILD. 



the old animal cannot be induced to pulsate. In concentrations 

 of w/iooo or higher, the young animal is always the more sus- 

 ceptible (see Table III.). 



The records on the loss of muscular contractility are very in- 

 complete, but it is evident that rhythmic pulsation and general 



TABLE IV. 



jEquorea: SUSCEPTIBILITY TO KOH. 



muscular contraction are not the same thing. Contractility of 

 the muscles of the umbrella persists in all three agents long after 

 ability to pulsate has disappeared, except in concentrations so 

 high that death is practically instantaneous. 



A complete but temporary inhibition of pulsation lasting from 

 a few seconds to several hours occurs in almost all cases in HC1 

 w/6oo. Above m/6oo inhibition is usually permanent. At 



