Marginella. MOLLUSCA. SOLENOSTOMATA. 335 
MARGINELLADiE. 
Gen. LXVIII. MARGINELLA. — Spire short; outer lip 
with an external border ; pillar folds equal ; no lid. 
300. M. Whorls two, greenish, the outer lip white. 
Cyprsea voluta, Mont. Test. Brit. 203. t. vi. f. 7. — Voluta Isevis, Don. 
Brit. Shells, t. clxv. — Inhabits deep water, rare. 
Length about half an inch, subconical, strong, smooth ; aperture linear ; 
both lips denticulated ; pillar subplicated. The Bulla diaphana of Montagu, 
Test. Brit. 225. t. vii. f. 8. is regarded as the young of this species. 
Gen. COLOMBELLA. — Aperture oblique; outer lip with 
an internal callus contracting the cavity ; pillar plaited ; no 
lid. 
1. C. Bartonensis.’ — Shell oval, contracted close to the beak, strongly reti« 
culated ; whorls about four or five, the last about two-thirds the length of 
the shell ; aperture elongated, curved, acute at both ends ; right hand lip ex- 
panded, undulated, toothed within ; left-hand lip smooth at the edge, toothed 
within.— Murex Bart, Sower. Min. Conch, t. xxxiv. lower figures. — London 
Clay. 
2. C. ventricosa. — Subovate, inflated, transversely striated; spire short, 
pointed, base notched ; three sharp plaits upon the pillar ; body-lip callous 
Auricula vent. Sower. Min. Conch. 465. f. 1. — In the Crag at Ipswich. 
3. C. hucchiea. — Subovate inflated, smooth; spire short, acute ; base notch- 
ed ; three sharp plaits upon the pillar ; left lip callous ; right lip with a thick 
border — Auricula buc. Sower. Min. Conch, t. cccclxv. f. 2.— In the Crag at 
Bamsholt. 
olivadj:. . 
Gen. OLIVA.— Shell subcylindrical ; aperture longitudinal, 
emarginate ; separating line canaliculated, by the inflection 
of the edge of the last whorl. 
1. O. Ovate, pointed, smooth ; spire prominent, last whorl con- 
vex ; mouth oblong; right lip thickened. — (Voluta Ispidula, Foss, 
f. 72.) Sower. Min. Conch, t. cclxxxviii. upper figure — London Clay. 
2. O. Salisburiana. — Subfusiform, short, ventricose, smooth ; mouth oblong, 
both lips tumid above.— Sower. Min. Conch, t. cclxxxviii. lower figures.— 
London Clay. 
