HETEHOGANGLIATA. 



Invertebrated Animals. 



No. 19. 

 HELIX POMATIA 



THE EDIBLES SNAIL,. 



The animal substance. A medicinal agent. 



Geog. Position. All parts of the world. 

 Quality. Slimy. 

 Power. Demulcent, restorative. 

 Use. Diseases of the lungs. 



SCIENTIFIC ANALYSIS. 



Natural Classification. 

 2. DIVISION Heterogangliata. CLASS Gasteropoda. 



Thomson, Mat. Med. *71. Jones, An. King. 397. Wyatt, Nat. Hist. 104. 



GENUS HELIX. 

 THE ESSENTIAL CHARACTERS. 



Head more or less distinct and situated anteriorly, furnished 

 with very movable appendages, tentacula, placed above the 

 mouth, which are the seat of touch) perhaps of smell. 



Eyes very small, sometimes entirely wanting, sometimes ad- 

 hering to the head, sometimes fixed at the base, side, or point 

 of the tentacula. 



Respiratory organs of various forms, upon which depends the 

 division of these animals into orders. 



Locomotion effected by the aid of a fleshy disc, placed under 

 the abdomen. 



THE SECONDARY CHARACTERS. 



HELIX. Shell complete, apparent, and globular. The open- 

 ing a little encroached upon by the projection of the penulti- 

 mate turn of the spire, and circumscribed in the form of a 

 crescent. Respiration effected in a cavity, the narrow orifice 

 of which they open and shut at pleasure. No branchice. 



THE SPECIFIC CHARACTERS. 



HELIX POMATIA. Head prominent, with four tentacula. At 

 the end of the larger pair are the eyes> minute, perfect. The 



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