USES OF ANUYtAi-S. 109 



There are no extinct birds known in Britain,, but the 

 remains of many extinct species of amphibia, fishes, parti- 

 cularly sharks, Crustacea, mollusca, and zoophytes, occur in 

 abundance in the floetz and transition strata. The fossil 

 species, indeed, probably exceed, in the mollusca, at least, 

 the numbers which live in the present day. 



6. Naturalised Animals. These are the natives of 

 other countries, which have, by accident or design, been 

 translated into our own. A few of these continue unre- 

 claimed, as the brown rat, pheasant, and several species of 

 fish ; while others depend on our protection, as nearly all 

 our domestic birds. Much, however, remains to be done 

 in this branch of national industry. 



CHAP. III. 



ECONOMICAL USES OF ANIMALS. 



IT is impossible to enter in detail on this part of the sub- 

 ject, which, of itself, might furnish materials for several vo- 

 lumes. We must therefore content ourselves with a very 

 few remarks on the Food, Clothing, and Medicine, together 

 with materials for the arts, which we derive from the sub- 

 jects of the animal kingdom. 



1. -FoocZ. Man employs, as articles of food, animals be- 

 longing to every class, from the quadruped to the zoophyte. 

 In some cases, he makes choice of a part only of an animal, 



wild state, as to lead to the conclusion, that they belonged to a well marked 

 variety, -probably to the white cattle which are still preserved in a wild 

 state in a few parks in different parts of the kingdom. 



