GENUS BUCCINUM. 95 
97. BUCCINUM THERSJITES, Bruc. The Thersites Buccinum. 
(Collect. Mass. Lam.) List., Conch., t. 971, fig. 26. 
Pl. XXVIII, fig. 113. 
B. testa ovata, crassiuscula, dorso valde gibba, longitudinaliter partimque 
plicata, basi striata, olivacea vel pallidé cerulescente, albo aut fusco fasciata ; 
gibbo, levi, maculato; 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 strie. 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 strie. 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 Isles 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. 
