GENUS B U C O I N U M . 



75. BUCCINUM UNIFASCIATUM, NOBIS. The One Banded 



Buccinum. 



(Collect. MASS.) 



PI. XIV, fig. 50. 



B. testA ovato-conica, elongata, nitida, luteo aut fulvo-albida ; anfracti- 

 bus convexiusculis, tenuissime plicatis, transverse striatis; aperjturd ovata, 

 albid& ; labro dextio crasso, inttis dentato; columella alba, arcuata. 



Shell ovate, conical, elongated, polished, spire composed of 

 seven pretty distinct, but slightly convex whirls, ornamented 

 with numerous deeply furrowed folds ; the folds of the lowest 

 whirl are gradually effaced by age, and sometimes completely 

 disappear. These folds are crossed by very fine and very 

 numerous transverse striae, colored with articulated, elongated, 

 brown and whitish spots ; the striae of the base are more 

 strongly prominent. Aperture ovate, whitish ; right lip thick, 

 denticulated internally. Columella white, arcuated, with a 

 few guttules at its base. The general color is of a yellowish 

 white, or fawn-color, with a brown, decurrent band above the 

 suture, and a single other at the middle of the lowest whirl, 

 like a girdle. 



Length 9 lines. Width 4 lines. 

 Inhabits the Mediterranean, on the coasts of Sicily. 



This species seems to resemble the BUCCINUM Cuvieri ; and 

 it would be well to regard it as a local variety of that ; never- 

 theless, there is an essential difference between the two shells ; 

 it consists in the very marked transverse band upon the lowest 

 whirl of the B. unifasciatum, which induced me to give it that 

 name, and its size, which is double that of the BUCCINUM Cuvieri. 



The One-banded Buccinum presents, also, in itself, some va- 

 rieties of color. Some specimens are of a straw-yellow, and 

 sometimes they have not the transverse band ; others, in which 

 the band is slightly apparent, have longitudinal spots upon 

 strongly marked transverse striae, of a dull white. 



