( 26 ) 



B. In the form of an ear. 



7. Halyotis. Lam. 



Spire or spiral apex flat- 

 tened, excedingly small. 



( M ega s to mat a.) 



a, Halyotis, Lam. 



Pierced by a series of 

 holes. PI. 5, fig, 24. 



b. Padolla, Montf, 



A deep furrow with- Almost all the holes ob- 

 in, forming a ridge literated. 

 without. PI. 6, fig. 4. 



Marine, 



Adhere to the rocks like 

 limpets, but inhabit deep 

 water, generally at a short 

 distance from the shore 

 (1). V. Animal, p." /. 



Coasts of Africa. Ani- 

 mal unknown. 



Animal unknown. 



Seas of warm cli- 

 mates. 



V. Animal, p. 71. 



Terrestrial. South of 

 France . Teneriffe . 

 V. Animal, p. 61. 



c. Stomatia, Lam. 



Spire more promi- No holes, 

 nent ; shell deeper. 

 PI. 5, fig. 21. 



d. Stomatella, Lam. 



Whorls carinated. 

 PI. 5, fig. 22. 



8. Sigaretus. Adans. 



Ditto ; mouth very deep ; No holes, 

 shell hidden within a spon- 

 gy buckler. PI. 5, fig. 25. 



9. Testacella. Lam. 



Oval, spire very small ; 

 semi-corneous, transpar- 

 ent. PI. 5, fig. 9. PL 6, 

 % 7, 8,9. 



10. Parmacella. Cuv. 



Oblong, flat, with a 

 slight commencement of a 

 spire behind. P1.6. fig. 10. 



11. Yitrina. Drapam. 

 Helico-limax. Feruss. 



Very thin, transparent, The mouth (diminish- Terrestial. Those of 

 flattened. PI. 5, fig. 14. ed by the projection of Europe live in humid 



the penultimate whorl of places and are very 

 the spire) in the form of small ; those of warm 

 a crescent, brpader than climates are larger, 

 deep. 



(1) They are found on the coasts of Brittany, Asia Minor, Barbary, Western 

 Africa, India, New Holland, New Zealand, and California. Luid and Scheuchyer 

 report that they have found the Halyotis in a fossil state. Bertrand, in his Dic- 

 tionnairc Orictologiquc, says that he possesses a shell of this Genus, brought from Vir- 

 ginia, resembling a ferruginous stone. 



Terrestial, Mesopo- 

 tamia. 



V. Animal, p. 61. 



