29 GENUS, BUCCINUM. 
20. BUCCINUM POLITUM, Lam. The Polished Buccinum. 
(Collect. Mass. Lam.) Cuermn. pl. 155, fig. 1469. 
Pl. VIII, fig. 27. 
B. testa ovato-conicd, apice peracuta, levissimA, nitidd, albo aut luteo- 
cerulescente ; anfractibus convexiusculis, supremis obsoleté plicatis ; aper- 
tura levi; labro simplici, margine acuto. 
Shell ovate, conical, very pointed at its summit, smooth, 
shining, of a bluish white or yellow color; spire elongated, 
formed of eight slightly convex whirls; the sutures .edged 
with a yellow border, and a little beneath with another violet 
band: these two zones are much more perceptible upon the 
lower whirl ; the upper whirls are often longitudinally plaited ; 
epidermis thin and greenish; aperture smooth, yellowish. 
The columella is slightly elongated, twisted at its extremity, 
and provided outwardly, at its origin, with two keels; the 
first is continued as far as the edge of the right lip, and the 
second terminates at the emargination, which is very apparent. 
The right lip is very thin, sharp and fragile. 
Length 15 lines. Width 6 lines. 
Inhabits the Seas of Senegal, and the rocks of the island of 
Timor. 
This shell is easily distinguished by the coloring of bluish 
white or yellow which is peculiar to it, and which is very con- 
stant. It is remarkable also for its very pointed extremity. 
21. BUCCINUM FUSCATUM, Bruce. The Dusky Buccinum. 
(Collect. Mass. Lam.) Kyorr. Veren., 5th part, pl. 22, fig. 4. 
Pl. VIII, fig. 24. 
B. testa ovato-conica, levigata, rufo-fuscA ; anfractibus convexis, superné 
longitudinaliter plicatis ; apertura levi, fuscA: labro tenui, simplici, mar- 
gine acuto. 
Shell ovate, conical, smooth, of a reddish brown; spire 
