32 GENUS BUCCINUM. 



long as all the others together, slightly flattened at its upper 

 part, and destitute of longitudinal ribs. 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 striae 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, Quov et GAIM. The Violet 



Buccinum. 



(Collect, du Museum.) Voyage, de V Astrolabe, pL 30, fig. 



32-34. 



PI. VIII, fig. 23. 



B. testa ovata, globulosa, fuscescente, violacea, transversim sulcata ; spira 

 brevi, obtusft, laevi ; anfractibus convexis, ultimo spira majore ; apertura 

 dilatata, ovaliformi, fuscescente ; labro dextro intus striato. 



Shell ovate, globular, ventricose, of a violaceous red brown, 



