362 



NATURAL THEOLOGY. 



the life of an animal that has often to sustain the 

 dangers of a stormy element and a rocky bottom, 

 as well as the attacks of voracious fish. The other 

 remark is upon the property, in the animal excre- 



Ostrea crista galli^ of Lamarck, Mytihis crista gallioi' Linr.a'us — 

 the cock's-comb oyster. 



tion, not only of congealing, but of congealing, or, 

 as a builder would call it, setting, in water, and 

 into a cretaceous substance, firm and hard. This 

 property is much more extraordinary, and, chemi- 

 cally speaking, more specific, than that of harden- 

 ing in the air, which may be reckoned a kind of 

 exsiccation, like the drying of clay into bricks. 



Cardium cardis^a — Venus' heart cockle. 



