20 GENUSBUCCINUM. 



v 20. BUCCINUM POLITUM, LAI. The Polished Buccinum. 

 (Collect. MASS. LAM.) CHEMN. pi. 155, fig. 1469. 

 Pi. VIII, fig. 27. 



B. testa ovato-conica, apice peracuta, Isevissima, nitida, albo aut luteo- 

 caerulescente ; anfractibus convexiusculis, supremis obsolete plicatis ; aper- 

 tura laevi; 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, BRUG. The Dusky Buccinum. 



? M 

 (Collect. MASS. LAM.) KNORR. Vergn., 5th part, pi. 22, fig. 4. 



<l<^ Iff.liJf. jtffl Pi. VIIl, fig. 24. 



B. test ovato-conica, lsevigata,rufo-fusca ; anfractibus convexis, superne 

 longitudinaliter plicatis ; apertura laevi, fusca: labro tenui, simplici, mar- 

 gine acuto. 



Shell ovate, conical, smooth, of a reddish brown ; spire 



