^PLATE XXXIX. 



FIG. I. 

 HELIX CORNEA. 



RAMS HORN. 

 GENERIC CHARACTER. 



Aperture of the mouth, contracted, and kmated. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Wreaths, four, turned nearly horizontal : rather depressed or concave 

 towards the centre. 



Helix Cornea: testa supra umbilicata plana nlgricante, anfractibus 



quatuor teretibus. Lin. Sj/st. N'at. p. 1 243. A^o. 67 1 . 



—F. Suec. I. p. 373. No. 1304. //. No. 2179. 

 Cochlea pulla, ex utraque parte circa umbilicum cava. List. IT. 



Angl.p. 143. tit. 26. tab. 2. fig. 26. 

 Cochlea maxima, compressa, fasciata. List. H. Conch, tab. 136. 

 fig. 40. — Cochlea pulla quatuor orbium coccuni 



fundens, purpura lacustris. Id. tab. 131. fig. 41. 

 The Flat Whirl. Grew. Mus. p. 136. 



Planorbis fluviatilis major vulgaris. Petiv. Gazoph. tab. 92. fig. 5. 

 H^lix Cornea, Horny. Penn. Br. Zool. No. 126. tab. 83. fig. 126. 



A 4 



