359 Mr. Jerrreys on the Testaceous Pnéumonobranchous 
Clausilia rugosa. Drap. Hist. des Moll. p. 13. t. 4. 
f.19,920. Lam. Hist. des Anim. sans Vert. ©. 
p. 115. 
Helix perversa. Müll. Verm. 2. p. 118. 
Turbo perversus. Penn. Brit. Zool. 4. p. 130. t. 82. : 
f.116. Don. Brit. Shells, 2. t. 12. 
—-— bidens. Mont. Test. Brit. p. 357. t. 11. f. T. 
——- nigricans. Pult. Dorset. p. 46. ed. 2. p. 51. t. 19. 
f. 10. Maton & Rackett in Linn. Trans. 8. p. 180. ! 
a. ventricosior; apertura plicis 2 vix 3 — columella- i 
ribus. 
B. minor; anfractibus paucioribus. 
Turbo Everetti. Miller in Ann. of Philos. 1822. p.311. 
. Common in the clefts of old walls, under stones, &c. 
Many curious distortions occur of the shell. In one a H 
prominent medial ridge accompanies the order of the vo- : 
lutions. 
3. PARVULA. 
Animal 
Testa gracilis, pellucida, glabriuscula, fulva. Anfractus 9, 
sutura indistinctà. Apertura uti in precedente 2-pli- 
cata. 
cO Long. 0.425 — Diam. 0.07. : 
Helix (Cochlodina) parvula. Fér. 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. Férussac re- 
© stricts the locality of the species to France and Switzerland. 
^odtisof a much more slender and tapering form than the 
nin fhe suture. Jens Misael and is. ao smooth and 
exceedingly transpa Tus 
4. P. 
