118 AURIC ULIDiE. 



1. Letjconia bidentata. B.M. 



Shell imperforate, ventricosely fusiform, rather solid, almost 

 smooth, shining, whitish ; spire conic, pointed ; suture linear ; 

 whorls six, flat, the last forming three-fifths of the total length, 

 inflated, attenuated at base ; aperture oblique, narrowly semi- 

 ovate, furnished with two plaits ; parietal plait rather trans- 

 verse ; columellar plait smaller, somewhat twisted ; peristome 

 slightly thickened, almost imperceptibly reflexed. Length 6|, 

 breadth 3| mill. 

 Voluta bidentata, Montagu, Test. Brit. Suppl. p. 100. pi. 30. f. 2. 



Dillw. Descr. Cat. ii. p. 507. 

 Jaminea bidentata, Leach, Catal. ined. 



Brown, El, Conch. Gr. Br. p. 22. pi. 8. f. 7. 

 Auricula bidentata, Ferussac, Prodr. p. 103. n. 9. 



Gray, Ann. of Philos. xv. 



Jeff): in Linn. Trans, xvi. p. 368. 

 Conovulus (Leuconia) bidentatus, Gray in Turt. Man. ed. nov. 

 p. 227. pi. 12. f. 145. 



Clark in Ami. fy Maq. N. H. 2 ser. vi. p. 445. 



Forbes and Hani. Brit. Moll. iv. p. 191. pi. 125. f. 1, 2. 

 Conovulus bidens, Gray in Turt. Man. Ind. t. 12. 

 Acteon bidentatus, Flem, Brit. Anim. p. 337. 

 Leuconia bidentata, Gray in Proc. Zool. Soc. 1847, p. 179. 



Pfr. Syn. Auric, n. 165 ; Mon. Auric, p. 154. 



H. and A. Adams, Gen. rec. Moll. ii. p. 248. 

 j3. With the spire eroded. 

 Auricula erosa, Jeffr. in Linn. Trans, xvi. p. 369. 



■y. Slender, with the spire more produced, aperture narrower, 

 columellar plait often nearly obsolete. B.M. 



Voluta, Boys and Walker, Test. rar. p. 17. pi. 3. f. 61 ? 

 Voluta alba, Mont. Test, Brit. p. 235 ? 



Dillw. Descr. Cat. i. p. 508. n. 22. 



Turt. Conch. Diet. p. 250. 

 Auricula alba, Ferussac, Prodr. p. 103. n. 10. 



Gray, Ann. of Philos. xv. 



Jeffr. in Linn. Tra?is. xvi. p. 368. 



Forbes, Malac. Mon, p. 12. 

 Volvaria alba, Flem. Brit. Anim, 

 Conovulus (Leuconia) albus, Gray in Turt. Man, new edit. 



p. 227. pi. 12. f. 146. 

 Conovulus bidentatus, var., Forbes Sf Hani, Brit, Moll. iv. p. 192. 

 Leuconia alba, H. and A. Adams in Proc. Zool. Soc. 1854, p. 36. 

 n. 1 ; Gen. rec. Moll, ii. p. 248. pi. 83. f. 3. 



Pfr. Syn. Auric, n. 166. 

 Hab. Coasts of Great Britain. 



