G N U S B U U C 1 M U M . gj 



folds at right angles, and become more apparent near the base 

 of the lowest whirl. Aperture whitish or violet colored, 

 nearly round ; right lip slightly margined, covered internally 

 with transverse striae. Columella arcuated, and twisted at its 

 base ; left lip, which partially covers it, is indistinctly striated, 

 and forms a wrinkle at the upper part. 



Length 18 lines. Width 5 lines. 

 Inhabits 'the'coa&s of Barbary, and of Western Africa. 



This species, which is nearly related to the BUCCINUM asca- 

 nias, ought to be united to it ; for it differs from it only in the 

 form of the lowest whirl, which is more ventricose, and by the 

 longitudinal folds, which are a little more separated. 



83. BUCCINUM AMBIGUUM, MONT. The Ambiguous Buccinum. 



(Collect. MASS.) MONT., Test. Brit., pi. 9, fig. 7. 



^A'-A-^^''^*' 

 Pi. XXI, fig. 81. 



B. testa parva, brevi, conico-globulosa, colore varia, fulvo fasciata aut 

 maculata, plicis longitudinalibus striisque transversim subtilioribus undu- 

 latis decussate! ; anfractibus convexis, carinatis ; aperture! alba, suborbicu- 

 latd ; labro dextro marginato, intus striato. 



Shell small, short, conico-globular, color slightly variable, 

 whitish or reddish, marked with fawn-colored bands or isolated 

 spots of the same color ; spire composed of six or seven 

 convex whirls, keeled and strongly folded. The whirls are 

 distant and swollen near the suture ; it has, also, upon its 

 entire surface, fine and numerous transverse striae. Aperture 

 whitish, suborbicular ; right lip margined, marked with brown 

 spots and striated internally ; columella arcuated ; the base 

 strongly recurved. 



Length 7 lines. Width 4 lines. 



Inhabits the Channel, the coasts of England,* the Mediterra- 

 Buccinum. F 



