OF NATURE. 
when upon opening its fhell it expofes itfelf 
as a prey to the fmalleft kind of fifties, thefe 
immediately aftault her, and growing bolder 
upon finding no refiflance venture in. The 
guard watching its time gives notice by a bite; 
upon which th e pinna doling its fhell, fhuts in, 
kills, and gives part of whatever happens to be 
there to its companion. 
The pinna , and the crab together dwell* 
For mutual fuccour in one common fhelk 
The/ both to gain a livelihood combine ; 
That takes the prey, when this has given the fign. 
From hence this crab above his fellows famed. 
By antient Greeks was pinnoteres named. 
Oppian. 
$. 18, 
Deftru&ion. 
We have obferved above that all animals 
do not live upon vegetables, but that there 
are fome which feed upon certain animalcula. 
Nay there are fome which fubfift: only by ra- 
pine, and daily deflroy numbers of the peace- 
able kind. 
Thefe animals are deilroyed, but in fuch a 
T 
1 manner 
