HOMOGANGLIATA. 



Articulated Animals. 



No. 23. 

 ANNELIDA TERRICOLA. 



EARTH-WORMS. 



The animal substance. A medicinal agent. 



Geog. Position. Abundant everywhere. 



Quality. Softening. 



Power. Emollient, lubricating. 



Use. Inflammations, ulcerations, phlegmasia dolens. 



SCIENTIFIC ANALYSIS. 



Natural Classification. 

 3. DIVISION Homogangliata. CLASS Annelida. 



M. Duges, Annales des Sciences Nat.. Vol. XV. Willis <le Anima Brutorum, 

 4to, 1672. Sir E. Home, Lectures on Comp. Anat., 4 vols. 4to, 1823. Hist. In- 

 sects, 202. Wyatt, Nat. Hist. 111. Jones, An. King. 201. Farmers' Encyc., Article 

 Earth-worms. Neligan's Med. 38. Smellie, Phil. Nat. Hist. 80. S ' 



GENUS ANNELIDA. 

 THE ESSENTIAL CHARACTERS. 



Body always considerably elongated, and composed of a suc- 

 cession of rings or segments, which, with the exception of 

 the first and last, scarcely differ from each other except in 

 size. Each ring is generally found to be furnished with a 

 set of short spines or setae, calculated to assist in locomo- 

 tion ; in no instance are articulated legs provided. 



Head, the first segment of the body, contains the mouth, 

 sometimes provided with a formidable apparatus of jaws; 

 and is also generally furnished with eyes and variously 

 shaped tentacula, which are apparently instruments of 

 touch. 



Tail, the last segment of the body, is generally the smallest, 

 and occasionally presents setiform appendages, and occa- 

 sionally a prehensile sucker, used as an organ of pro- 

 gression. 



Blood remarkable for its red color, and circulating in a double 

 system of arteries and veins. 



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