58 BOOK OF SPECIES. 
dulated with obsolete strize ; white; spire rather 
prominent ; aperture slightly concave, and dilated; 
umbilicus covered; diam. 13. Front. 3. | 
STOMATIA. 
Ear-shaped, imperforate ; spire prominent ; aper- 
ture entire, oblong, and large; right lp ele- 
vated as much as the pillar ; back with a trans- 
verse sub-carinated tuberculated rib. 
S. poymoTis. W. 36. 18. 
STOMATELLA. 
Orbicular or oblong, ear-shaped, imperforate; aper- 
ture entire, large, elongated; outer lip effuse, 
dilated, open, and iridescent. 
S. 1mBRricaTaA. Sub-orbicular, convex de- 
pressed, roughish, grey, with crowded transverse 
scaly imbricated furrows; spire slightly promi- 
nent; 1} diam. W. Sup. 8. 4. 
S.AuRICULA. Haliotis-shaped, ovate-oblong, 
convex on the back, smooth, yellowish rose- 
colour, with brown lines; spire lateral, slightly 
prominent; lip arcuated by a sinus; diam. ¢. 
W. 37. 54. 
HALIOTIS. 
Ear-shaped, usually depressed ; spire short, some- 
times depressed, and nearly lateral; aperture 
extremely large, oblong-ovate, and entire in 
