366 Mr. Jeffreys on the Testaceous Pneumonohranchous 



libus in columella, 2 in columellari labio, et 2 in labio 

 externo : peristomio subincrassato. Umbilicus nullus. 



Long. 0.25. — Diam. 0.1 fer^. 



Turbo tridens. Mont. Test. Brit. p. 338. t. 11. /. 2. 



Maton Sf Rackett in Linn. Trans. 8. p. 181. Pult. 



Dorset, ed. 2. p. 51. t. 21. f. 15. 

 Helix (Cochlodonta) Goodalli. FSr. 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 Miiller 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 genus. 



Genus XII. AURICULA. Drap. 



Animal anteriore parte capitis proboscidali. Tentacula subu- 

 lata. 



Testa turrita, fusiformis, spir^ acuminata, incomplete. Anfractus 

 sese invicem involventes, ultimo plusquam maximo. 

 Apertura elongata, dimidium testae aequiparans, ad ba- 

 sin subefFusa, lamellis continuis instructa. Umbilicus 

 nullus. 



The inhabitants of this genus, though from the nature of 



their 



