ff 



APPENDIX. 317 



LESSON 102. Vermes. 



Linnaeus divided Vermes or worms into five orders, 1. In- 

 testinal worms, as tape worms, leeches, Slc. 2. Molluscous 

 worms, chiefly inhabiting the sea. 3. Testaceous worms, as 

 muscles, oysters, snails, &c. 4. Zoopliytes, 5. Infusoria., 

 or animalcules. 



Note. In treating of any particular animal, naturalists 

 are accustomed to designate it by a name derived from its 

 genus and species. This name is comprised of two words ; 

 the first being the name of its genus ; and the second being 

 altogether arbitrary, or else expressing some circumstance 

 relating to the colour, size, or residence of the animal, which 

 serves in a degree to distinguish it from others. The first is 

 called its generic, the second its trivial or specific name. 

 For example : in the class Mammalia, order carnivora, the 

 genus Felis includes all those of the cat kind (Felis being^ 

 the Latin word for cat) and these animals, although differing 

 one from another very much in size and colour, have yet a 

 very close resemblance in their general form, figure, charac- 

 ter, and habits of life. The different species of the genus 

 Felis are distinguished from one another in the following 

 manner : — The Lion is called Felis leo ; the Tiger, Felis 

 tigris ; the Leopard, Felis leopardus ; the Lynx, Felis lynx, 

 &c. In the genus Canis, the dog is called Canis domesti- 

 cus ; the wolf Canis lupus ; the fox, Canis vulpes, &c. In 

 the class of Birds, order accipitres, the genus Falco includes 

 those of the eagle or hawk kind: — The fierce eagle is called 

 Falco ferox, the common falcon, Falco communis, the Ameri- 

 can brown hawk, Falco fuscus, &/C. 



The Lessons on Zoology, in this Class Book, have been 

 abstracted from Dr. John Ware's edition of Smellie's Phi- 

 losophy of Natural History ; chiefly from the Ii^roduction, 

 which was wholly prepared by Dr. W., whose system of clas- 

 sification is principally derived from Cuvier, a celebrated 

 French naturalist. The class of insects, however, is ar- 

 ranged in orders according to the system of Linnaeus. Be- 

 sides the above, the following works have been consulted, 

 and from many of them extracts made. Conversations on 

 Natural Philosophy ; Webster's Elements of Natural Phi- 

 losophy ; Blair's Grammar of Natural and Experimental 

 27* 



