FAMILY AUE.ICULACEA. 129 



inner ridge. On these two forms of Conovulus are founded M. Mo- 

 quin-Tandon's subgenera Ovatella and Phytia, and Dr. Gray's 

 genera Alexia and Leuconia. In the interior of the shell the septa 

 of the whorls are generally absorbed towards the apex, and the 

 visceral extremity of the animal losing its spiral contour becomes 

 obtusely conical. 



The British species of Conovulus are : — 



1. denticulatus. Shell fusiformly ovate, of six to seven whorls, 



columella with four winding plaits and teeth, lip with an 

 inner ridge of teeth. 



2. myosotis. Shell fusiformly oblong, rather inflated, of six to 



seven whorls, columella strongly four-toothed, lip simple, 

 slightly thickened within. 



3. bidentatus. Shell fusiformly oblong, of six to seven whorls, 



columella with two teeth, the lower tooth being a nearly ob- 

 solete winding plait. 



1. Conovulus denticulatus. Toothed Conovulus. 



Shell ; fusiformly ovate, rather solid, yellowish white, opake, co- 

 vered with a chestnut horny epidermis, spire 

 more or less produced, whorls six to seven, 

 flatly convex, plicately striated next the su- 

 tures ; aperture narrowly ovate, rounded at 

 the base, lip simple, rather thickened and ser- 

 rately toothed within, columella callous with 

 four winding plaits and teeth. 



Voluta denticulata, Montagu (1803), Test. Brit. p. 234, 

 pi. xx. f. 5. 



Voluta ringens and reflexa, Turton (1819), Conch. Diet. 

 p. 250, 251. 



Acteon denticulatus, Fleming (1828), Brit. Anim. p. 337. 



Auricula denticulata, Jeffreys (1830), Trans. Linn. Soc. vol. xvi. p. 367. 



Auricula tenella, Menke (1830), Syn. Moll. 2nd edit. p. 131! 



Carychium personatum, Michaud (1831), Comp. de Drap. p. 73. vol. xv. 

 f. 42, 43. 



Pythia denticulata, Beck (1837), Ind. Moll. p. 103. 



Auricula personata, Potiez and Michaud (1838), Moll. Gal. de Douai, vol. i. 

 p. 105. 



Conovulus f Ovatella) denticulatus, Gray (1840), Man. p. 225. pi. xii. f. 144. 



