CONOVULUS. 
195 
Mr. Jeffreys suspected that Valuta Tiyalina Mon- 
tagu was only an imperfect specimen of this species : 
Montagu’s specimen is a foreign marine shell not 
yet arrived at its full growth. 
b. Pillar two-plaited ; throat smooth ; peristome 
simple. (Leuconia.) Marine. 
89. 2. CONOYULUS Udeutatus. Two-toothed Cono- 
vulus.— Shell ovate^ ventricose, smooth, shining 
white; spire short; suture indistinct; mouth 
oblong; two of the plaits of the pillar larger 
than the rest ; peristome slightly thickened and 
reflexed in front, (t. 12. f. 145, 146.) 
Voluta bidentata. Mont. T. B, Suppl. 100. t. 30. f. 2.— Auri- 
cula bidentata. Ferussac.^ Tab. Moll. 103. ; Gray., Ann. Phil, 
15.; Jeffreys., Linn. Trans, xvi. 368. (not Gould). — Jaminia 
bidentata. Leach., Syn. Moll. 97. — Acteon bidentatus. Flem. 
B. A. 337. — Conovulus bidentatus, and C. alba. Gray., Man. 
227. t. 12. f. 145, 146. — Auricula Micheli. Mettre., Rev. 
Zool. 1841, 66. — Auricula dubia. Cantr. Bull. Brux. ii. 
383. — Ovatella bidentata. Bivona, 22. t. 2. f. 10, (?) — ■ 
Auricula myosotis, var. /3. Philippi^ Moll. Sicil. i. 143. (?). 
Var. Auricula erosa. Jeffreys, Linn. Trans, xvi. 269. 
Var. alba, shell and aperture rather narrower, spire rather 
more produced, lower fold nearly obsolete : t. 12. f. 146. 
Voluta alba. Turt. C. Diet. 250. (not Montag. nor Maton 
and Racket.) — Auricula alba. Feruss. Tab. Moll. ; Gray, 
Ann. Phil. 1825, 15.— Volvaria alba. Flem. B. A. 333. 
Inhabo the sea-coast (of Devon), under stones left 
by the tide. 
Animal, according to Montagu, white, with two 
very short angular tentacula, usually edged with 
black, and with two black eyes at their base behind ; 
the foot extending before the head, bifid. 
