32 GENUS BUCCINUM. 
long as all the others together, slightly flattened at its upper 
-part, and destitute of longitudinal mbs. In some specimens 
these ribs which cover the-whirls disappear entirely. Aper- 
ture ovate, ash colored at its depth; right lip thin, sharp, 
marked with transverse brown lines and strie internally ; colu- 
mella nearly straight, slightly twisted at its base, accompanied 
at its lower third, by a thick, rounded and twisted callosity, 
which terminates at the base of the notch. 
Length 14 lines. Width 7 lines. 
Inhabits port Western in New Holland. 
Quoy and Gaimard considered this species as. a variety of the 
Buccinum testudineum, but without positively affirming it. In- 
deed it is perfectly distinguished from that by many differences : 
the B. alveolatum is smaller, the folds which cover it are project- 
ing, their peculiar distribution give them a square or elongated 
form, which we have compared to a chequer-board. In young 
specimens these spots are often arranged in diamonds. ‘These 
spots are more deeply colored than in the B. testudineum, the 
whirls are more convex, and the folds which cover them are very 
apparent. The lowest whirl of the shell is also compressed 
above. The aperture of this which we have described, instead 
of being smooth and of a chamois-yellow color like the B. testu- 
dineum, is invariably violet, with the lip feebly furrowed within. 
Finally, these two species do not inhabit the same localities. 
33. BUCCINUM VIOLACEUM, Quoy et Gaim. The Violet 
Buccinum. 
(Collect. du Museum.) Voyage de l Astrolabe, pl. 30, fig. 
32-34. 
Pl. VIII, fig. 23. 
_. B. testa ovata, globulosi, fuscescente, violaced, transversim sulcata ; spira 
brevi, obtusa, levi; anfractibus convexis, ultimo spird majore; apertura 
dilatatd, ovaliformi, fuscescente ; labro dextro intis striato. 
Shell ovate, globular, ventricose, of a violaceous red brown, 
