352 Mr. Jeffreys on the Testaceous Pneumonohranchous 



Clausilia rugosa. Drap. Hist, des Molt. p. 73. t. 4. 

 /. 19, 20. Lam. Hist, des Anim. sans Vert. 6. 

 p. 115. 

 Helix perversa. Milll. Verm. 2. p. 118. 

 Turbo perversus. Penn. Brit. Zool. 4. p. 130. t. 82. 

 /. 116. Don. Brit. Shells, 2. t.72. 



bidens. Mont. Test. Brit. p. 357. t. 11./. 7. 



nigricans. Pidt. Dorset.p.46. ed.2. p. 51. t.lQ. 



f. 10. Maton Sf Rackett in Linn. Trans. 8. p. 180. 

 "■* ' a. ventricosior ; apertura plicis 2 vix 3 mediis columella- 

 ribus. 

 ^. minor ; anfractibus paucioribus. 

 •^ •'''*' Turbo Everetti. Miller in Ann. of Philos. 1822. p. 377. 



Common in the clefts of old walls, under stones, «Scc. 

 Many curious distortions occur of the shell. In one a 

 prominent medial ridge accompanies the order of the vo- 

 lutions. 



3. Pauvula. 



Animal 



Testa gracilis, pellucida, glabriuscula, fulva. Anfractus 9, 

 sutur^ indistinct^. Apertura uti in praecedente 2-pli- 

 cata. 



Long. 0.425.— Diam. 0.07- 

 Helix (Cochlodina) parvula. Fir. Tab. des Moll. p. 63. 

 Of this rare and elegant shell I found one specimen 

 which had the remains of the animal in it, among the re- 

 jectamenta of the Avon river near Bristol. Ferussac re- 

 stricts the locality of the species to France and Switzerland. 

 It is of a much more slender and tapering form than the 

 last, with the suture less distinct, and is nearly smooth and 

 exceedingly transparent. 



4. Plicatula. 



