56 CLASSIFICATION AND CREATION. 
animals, one ceases to wonder that Nature should 
make large provision against the many chances 
of destruction that beset them, and one may 
readily believe, that, of the eight millions of eggs 
born from one individual, a comparatively small 
number survive. 
The next class in the type of Articulates is 
that of Crustacea, including Lobsters, Crabs, and 
Shrimps. It may seem at first that nothing can 
be more unlike a Worm than a Lobster; but 
a comparison of the class-characters shows that 
the same general plan controls the organization 
in both. The body of the Lobster is divided into 
a succession of joints or rings, like that of the 
Worm; and the fact that the front rings in the 
Lobster are soldered together, so as to make a 
stiff front region of the body, enclosing the head 
and chest, while only the hind rings remain 
movable, thus forming a flexible tail, does not 
alter in the least the general structure, which 
consists in both of a body built of articulated 
rings. The nervous swellings, which were even- 
ly distributed through the whole body in the 
Worm, are more concentrated here, in accord- 
ance with the prevalent combination of the rings 
in two distinct regions of the body, the larger 
ones corresponding to the more important or- 
gans ; but their relation to the rest of the organ- 
ization, and their connection by nervous threads 
