30 MOLLUSCA. TRACHELIPODA. 



Gen. 11. COLOMBELLA, Lam. Valuta, Lin. 



Shell oval or ovate, with the spire short, and the base of the 

 aperture more or less emarginate, and without canal ; colu- 

 mella plicate ; outer lip with a prominence internally, which 

 narrows the aperture. 



The Colombellse are small, short, and in general prettily coloured shells. They 

 are all marine, and inhabit the seas of warm climates. The animal has a very small 

 elliptical operculum, and two tentacula. 



C. mercatoria, Lam. Shell ovate, transversely sulcate, white, marked 

 with transverse brown lines, sometimes banded; the outer lip 

 denticulated internally. 10 lines long. Inhabits the seas of the 

 West Indies, &c Pet. Gaz. pi. 9, fig. 4. 



Q.fulgurans, Lam. Shell ovate, striated at the base, blackish brown, 

 with longitudinal flexuose white bands ; spire short and obtuse ; 

 aperture bluish ; outer lip very thick and dentate. f of an inch 

 long. Inhabits the Indian Ocean Pel. Gaz. pi. 49, fig. 9, 10. 



C. mendicaria, Lam. Shell ovate, ventricose, nodulose, transversely 

 striated, marked with alternate white and black or yellowish 

 transverse bands ; aperture brownish; outer lip thick and dentate. 

 8 lines long. Inhabits the seas of India Pet. Gaz. pi. 11, fig. 5. 



FAMILY III. PURPURIFERA. 



Shell with a short canal ascending posteriorly, or an oblique 

 notch at the base of its aperture, directed backwards. 



The Purpurifera have only a very short canal, or little more than a mere notch at 

 their base. They are most abundant in the seas of warm climates, to which some 

 of the genera are confined, but many of them also occur in cold regions. They are 

 all operculate. This numerous family is divided into two sections, viz. 1 . with an 

 oblique notch, having a direction backwards : TEREBRA, EBURNA, BUCCINUM, 

 DOLIUM, HARP A, CONCHOLEPAS, MONOCEROS, PURPURA, RICINULA. 2. with 

 a canal ascending toward the back ; CASSIS, CASSIDARIA. 



1. With an oblique notch directed backwards. 



Gen. 12. TEREBRA, Lam. Buccinum, Lin. 

 Shell elongated, turreted, acuminate ; aperture longitudinal, se- 

 veral times shorter than the spire, notched at its posterior 

 base ; base of the columella contorted or oblique. 



The Terebrae are distinguished from the Turritellae by the different form of their 

 aperture, and from the Buccina by its shortness comparatively with the spire. They 

 are marine. 



T. maculata, Lam. Shell conico-subulate, thick, smooth, white, with 

 dark brown spots arranged in rows, and toward the base spotted 

 with yellow. 5 inches long. Inhabits the Indian seas and the 

 Pacific Ocean. Lister, pi. 846, fig. 74. 



This species is the most beautiful and one of the largest of the genus. 



T.flammea, Lam. Shell turreted, subulate, very long, longitudi- 

 nally waved and ornamented with reddish brown spots ; the 

 whorls somewhat convex, divided in the middle by a groove and 

 transversely excavated beneath. 5^ inches long. " Inhabits the 

 Indian Ocean Lister, pi. 841, fig. 69. 



