38 
most powerful instrument possessed by any of the 
animalia mollusca: but the garden snail possesses 
eight effective teeth, and all gardeners know too 
well the extensive ravages to which he is capable of 
directing them. The pyrosoma, holothuria, the pulmo, 
or sea jelly, the actiniz, are either one single soft 
sucker, or composed of many. The mouths of plants 
may be generally said to be in their roots: but in 
fact they are for the most part all mouth: the blos- 
soms, leaves, and stem of many exhibit several ana- 
logies with mouths of animals. Blossoms, leaves, 
and stems are not unfrequently armed for offence 
and defence. The blossoms of the stapelia and of 
the apocynum attract flies into their throats: when 
bristles pointed inwards, like those on the lion’s 
tongue, and like teeth on the palates of many fish, 
prevent their escape. The hollow leaves of the sara- 
cenia swallow numerous insects, the putrescence of 
which probably contributes to the vigour of the 
plant. The ensnaring leaves of the dionza musci- 
pula and sundew are well known. The calyx, the 
stem, and the leaf are often surrounded with re- 
pulsive thorns or prickles, or with stinging hairs or 
bristles, and with viscous varnish, by which insects 
are entangled and destroyed, and other assailants 
deterred. 
Feet. 
The feet and teeth, in most classes of animals, 
have a striking mutual accordance: with exceptions, 
however, which are just sufficient to shew that even 
