



tuberculate, canal longer. 
GA Z : Ly 5 
Oteon ge 15 LRRD Tif GEAANE” ores 
89 
anterior to this. Seven well-marked, acute, rounded tubercles 
on the shoulder on the dorsal aspect, none on the ventral, present — 
but much less valid on the carina. Spiral lire eleven behind the | 
angle, eleven to carina, and 22 to end of canal; sublenticular 
growth-lines, no longitudinal cost ; ventral surface very flatly 
convex, shoulder obsolete, carina absent, no tubercles, lire faint. 
Aperture obliquely oval, sharply marked off from the canal; 
columella arcuate, inner lip thin, distinct, joining outer lip 
behind, and forming a minute sinus with it by means of a small 
tooth-like spiral callus. Outer lip thickened by an ascending 
external varix, bevelled inside to a sharp margin, seven or eight 
teeth internally, the anterior three or four doubled. 
Length of aperture, 8:5 mm.; breadth, 6°5 mm.; canal, 5:5 
mm., almost closed, curved obliquely to the left, slightly recurved. 
Ornament, irregular rusty blotches, with articulated rusty spots 
on carina. Total length, 21 mm.; breadth, 11-25. 
Habitat.—Dredged, Tapley’s Shoal, 12-16 fathoms. One, im- 
mature, dead (Mr. Matthews). Investigator’s Straits, 15 
fathoms, one dead ; 20 fathoms, one immature, dead (Verco). 
From 7. Bassi it differs by spire more acute, nucleus much 
smaller, more acute and angled, varix later formed (in 7. Bassi 
after three or three and a-half turns), whorls more angled and 
Shell ovate-fusiform, very solid. Spire elevated, shorter than 
the aperture. Whorls six, without the nucleus which is wanting; 
rather convex, roundly angled just below the middle, and pro- 
vided with eight or nine rounded well-marked nodules, about 
equal in width to the intervals, and costate in the lower half of 
the whorls, Spiral lire eight to ten, distinct, varying in size, 
devious, about equal in width to the interstices, and crossed by 
longitudinal rather distant scabrous lines of growth. Suture 
distinctly marginate, sinuous, ascending between the coste, edge 
crinkled by imbricating growth lines. First and second whorls 
nearly destroyed by fine borings. Last whorl subventricose, 
shouldered at six lines from the suture, very slightly concave 
above, convex below, narrowing rapidly to its minimum at the 
middle point of the ventral surface; with nine very valid longi- 
tudinal cost, flatly rounded, rather wider than the interspaces, 
highest at the shoulder, which abruptly points them, very slightly 
marked above the shoulder, gradually narrowing and subsiding 
below, to disappear at the middle of the base. Well-marked 
spiral lire sub-equidistant (16 in the whorl), with an occasional 
spiral thread between the more distant (four in the whorl). 
Above the shoulder the lire, five in number, are narrowest ; 
if 
