254 MOLL USC A. 
Inhabits New Zealand. 
Another of the peculiar group of liver-coloured Buccina from Aus- 
tralia, which seem to have a loose, porous, ash-coloured, superficial 
layer, with a posterior notch to the aperture (Tritonzum?). It is well 
marked by the excavated constriction near the suture, and the coro- 
nated appearance produced by the termination of the folds at the 
middle of the whorls. 
Figures 320, 320 a, two views of the shell. 
Buccinum Fossatum (Gould ). 
Testa tenuis, ovata, ventricosa, rufo-cinerea, annulis et sulcis subequah- 
bus cincta: spira conica, anfractibus septem convexis, supernis cla- 
thratis, ultimo ventricoso, postice declivi et oblique fluctuato: anticé 
brevissimé rostrato ; rostro canal valde effosso cincto: apertura lata, 
ovato-quadrata ; labro valde arcuato; columella obliqué hrata et callo 
tenut induta. 
Buccinum fossatum, Gouin; Proceed. Boston Soc. Nat. Hist., iii. 
152. January 1850. Expedition Shells, 67. 
Suet broad-ovate, elongated, thin, livid, ash-coloured, encircled 
throughout with raised ridges, of a deeper colour, interspaces of about 
equal width. On the upper whorls these ridges are formed into 
coarse granules by longitudinal folds about equally distant, but more 
shallow. On the upper slope of the last whorl, in some specimens, 
these are increased so as to become conspicuous, very oblique waves 
or nodules, terminating at the middle of the whorl. Spire of seven 
convex whorls, the last of which is ventricose, and has the usually 
constricted, posterior groove encircling the beak, excavated into a 
broad, remarkably deep canal; suture linear. Aperture broad, quadrate- 
ovate ; lip sharp, simple, oblique posteriorly, parallel to the axis laterally 
and perpendicular to it at base, thus forming an obtuse angle at the 
posterior third, and a right angle at its anterior limit, which is a little 
in advance of the point of the beak; siphonal notch broad, short, 
scarcely reflexed ; pillar covered with a thin layer of enamel, but in 
general not enough to obliterate the groove and ridges, so that it 
