GENUSBUCCINUM. 95 



97. BUCCINUM THERSITES, BRUG. The Thersites Buccinum. 



(Collect. MASS/LAM.) LisT.^ncli.ft. 971, fig. 26. 



Pi. XXVIII, % 113. 



B. testA ovata, crassiuscula,dorso vald6 gibba, longitudinaliter partlmque 

 plicata, basi striata, olivacea vel pallid^ coerulescente, albo aut fusco fasciata ; 

 gibbo, Isevi, maculate; labro crasso, intus dentato. 



Shell ovate, thick, slightly triangular, gibbous upon the 

 back, attenuated towards the extremities ; that of the spire is 

 more pointed ; it is composed of seven whirls, the upper six of 

 which are little convex, with very compact longitudinal folds ; 

 that of the aperture generally has folds only upon the side of 

 the left lip. The opposite surface is smooth ; the base of the 

 lowest whirl is crossed by transverse striae. Aperture white, 

 subquadrate, longer than wide. The depth of the cavity is 

 brown. Right lip thick, raised outwardly in the form of a 

 collar, and furnished internally with transverse striae. Left lip 

 is blended with the right in a thick callosity which covers the 

 first two or three whirls ; upon the side of the aperture this 

 callosity is ovate, polished, white, edged with reddish. The 

 color is olive or bluish, marked upon the middle of the lowest 

 whirl, with a transverse white or brown band, the edge of 

 which is of a deeper color. 



Length 10 lines. Width 6 lines. 



Inhabits the seas of the Asiatic Ocean, and the Tsles of 

 Vanikoro and of Bourou. 



Young specimens of this species have the longitudinal folds 

 of the lowest whirl more prominent ; the swelling of the back 

 does not exist upon these young shells ; the lip is thin, and the 

 columella without callosity. 



