ICHTHYOLOGY. 67 



more copious account of them will be given under 

 their respective classes. 



Q. What is the Lobster ? 



A. Cancer Gammarus, or Lobster, is an animal 

 of the crustaceous kind, covered with a black shell, 

 which it sheds every year ; and armed with claws, 

 with which it can bite severely ; it has four legs 

 on each side, and a small head, from whence pro- 

 ject two long feelers or horns ; the eyes are black, 

 and of a horny substance, and these the animal 

 can draw in or put forth at pleasure ; its tail ifc 

 jointed and generally folded under the body. 



Q. Describe the Crab. 



A. Cancer Maenas, or the common Crab, is of a 

 broader and flatter shape than the Lobster, and its 

 tail is merely a broad flap under the belly ; the 

 number of legs and claws is the same as in that 

 animal ; it is of so voracious a nature, that those 

 who carry it to market are obliged to tie its claws 

 to prevent its devouring the others of its kind. 



Q. Is there not a very remarkable species ? 



A. Yes ; Cancer Diogenes, or the Soldier Crab, 

 sometimes called the Hermit Crab, has no natural 

 shell of its own, but inhabits the empty cavities of 

 turbinated shells ; when grown too large for its pre- 

 sent habitation, it seeks along the edge of the water 

 for another more suitable, taking care, however, 

 not to give up the old till suited with a new. 



Turbinated, a. wreathed like the shell of the snail. 



