GENUS BUCCINUM. 



91 



whirls, somewhat flattened at their upper part, ornamented 

 with longitudinal, spinous folds ; the lowest whirl supports two 

 or three rows of spinous, distant tubercles; besides, the whole 

 shell is crossed by pretty fine, transverse striae, more apparent 

 towards the base. Aperture sub-rounded ; right lip margined 

 externally, and striated internally. The color of this shell is 

 grayish, with irregular transverse bands of a slate or violet 

 color. The tubercles are sometimes white, arid oftentimes 

 brown lines cross them. 



Length 7 lines. Width 4 lines. 

 Inhabits 



This species is easily known by the rows of tubercles which 

 cover almost its whole surface. 



1 94. BUCCINUM ARCULARIA, LINN.,GMEL. The Casket Buc- 



cinum. ^ /-* ft ? q 



(Collect. MASS. LAM.) LIST., Conch., p. 970, fig. 24 



B. testa ovata, ventricosa, crassa, cinereo-ccerulescente, albo aut fusco 

 fasciata; ultimo anfractu turgido, tuberculis coronato; anfractibus spirse 

 longitudinaliter grosseque plicatis ; labro intus striato; columelia arcuata, 

 callosa. 



Shell ovate, ventricose, pretty thick, composed of six or 

 seven flattened whirls, angular above, and the lowest of which 

 forms of itself half the shell; this whirl is very much inflated, 

 and furnished externally with thick, longitudinal, distant folds, 

 which are intersected by transverse striae ; the upper extremity 

 of each fold is terminated by a conical tubercle, sometimes 

 separated from it by a transverse stria which divides it super- 

 ficially into two. The upper whirls are convex, loaded also 

 with compact folds and transverse striae ; but in these the 

 tubercles are slightly perceptible, and upon some specimens 

 not at all. Aperture ovate, white, terminated at the summit 



