MOLLUSCA. 
391 
plicated ■ the plaits being parallel and transverse, the lower ones 
smallest; pillar lip thin and adnate. 
Mitra pontificalis. — The Pontifical Mitiia. 
Plate LXXXIV. fig. 9. 
Turreted, ovate; covered with a yellow-olive epidermis, 
beneath which are interrupted fillets of orange spots; spire 
crowned with tubercles. Two and a half inches long. Inhabits 
the Chinese sea. 
Genus 11.—C OLOM BELLA.— Lamarck. 
Generic Character. —Shell oval; spire short; base of the 
aperture more or less emarginate, and destitute of a canal; 
columella plicated; outer lip with an internal prominence, which 
contracts the aperture. 
Colombella mercatoria. — The Merchant Colombella. 
Plate LXXXIV. fig. 10. 
Ovate, white, sulcated, transversely clouded with brown, or 
yellow-orange; outer lip with internal dentations. An inch 
long. Inhabits the West Indian seas. 
TRIBE III.-PURPURIFERA. 
Shell with a short canal posteriorly ascending, or with an 
oblique notch at the base of the aperture, directed backwards. 
Sub-Division 1.— Having an oblique notch directed back¬ 
wards. 
Genus 12.—TEREBRA.— Lamarck. 
Generic Character. —Shell elongated, turreted, acuminated ; 
aperture longitudinal, several times shorter than the spire, notched 
at its posterior base ; base of the columella contorted and oblique. 
Terebra vittata. — The Filleted Terebra. 
Plate LXXXIV. fig. 12. 
Pale fawn-coloured, smooth ; body, and volutions transversely 
striated at the top, and with transverse purplish fillets, oc¬ 
cupying nearly its lower half. One inch long. Inhabits the 
Indian ocean. 
