ON ACALEPHA,. 571 
water, and the tentacula, &c. more or less deep in the sea. 
M. Tilesius adds that these animals sound with their tenta- 
cula all the bodies which may be near them under water, that 
their suckers are applied upon wood, stone, and even upon 
glass, and porcelain, and deposit a mucous matter there 
which communicates to these bodies the same burning pro- 
perty possessed by the tentacula themselves. 
