366 Mr. Jerrreys on the Testaceous Pneumonobranchous 
libus in columella, 2 in columellari labio, et 2 in labio 
externo: peristomio subincrassato. Umbilicus nullus. 
Long. 0.25.— Diam. 0.1 fere. 
Turbo tridens. Mont. Test. Brit. p. 338. t. 11. f. 2. 
Maton & Rackett in Linn. Trans. 8. p. 181. Pult. 
Dormi L S p 91. 4. 21. f. 15. 
- Helix (Cochlodonta) Goodalli. Fér. Tab. des Moll. p.71. 
Though confined to certain localities, this shell has been 
lately found in considerable plenty in different parts of 
Great Britain. For my specimens I am indebted to the 
kindness of Mrs. Smith, who collected several of them 
alive about eight or ten years ago on some loose fragments 
of rock in Brockley Coombe near Bristol. The physiology 
of the animal yet remains in considerable doubt ; and it is 
much to be wished that. some naturalist, who has an oppor- 
tunity of doing so, would attend to the habits and pecu- 
liarities of this interesting species. 
The Helix tridens of Müller is more closely allied to this 
species than has been supposed ; and from its great resem- 
blance in the form of the shell will probably rank under the 
same penne. 
E . Genus XH.  AURICU LA. Drap. 
A US iiis parte capitis. oro roscidali. tei otfacula subu- 
à lata. ss 
Testa turrita, fusiformis, spirá acuminata, complet D Facits 
sese invicem involventes, ultimo plusquàm maximo. 
Apertura elongata, dimidium teste zequiparans, ad ba- 
. sin subeffusa, lamellis continuis instructa. Umbilicus 
this ge us, though from the nature of 
3 their 
