TROCHID&. 99 
Length, 1°35; breadth, 2:2; angle of spire, 85.° 
Common in Cook Strait, not known in the South. 
In the young the body whorl is less sharply angled ; there is often a 
row of purple spots round the suture, and the base is ornamented with 
interrupted pinkish-brown lines. 
Genus, CANTHARIDUS—Montfort. 
Ovate conical ; whorls slightly keeled ; columella with a small tooth 
in front; outer lip entire; throat smooth; mouth sub-ovate, rather 
elongate ; operculum circular. 
C. iris, Gm. ; Elenchus tris, Gray, Dieff: N.Z., ii., p. 239 3 Wood- 
ward’s Manual of the Mollusca, pl. 10, f- 8. Whorls slightly rounded, 
smooth, spirally striated ; body whorl more or less keeled ; pinkish, with 
irregular longitudinal zig-zag red markings; apex often transversely 
banded with white. 
Length, 1°3; breadth, 1°1 ; angle of spire, 50° 
Common in the North, rare in the South. Chatham Islands. 
The young shell is perforated, but the perforation gets covered over 
by a callous expansion. 
C. zealandicus, Adams, P.Z.S., 1851, p. 169; C. iris, Chenu, 
J. 2669; Z. purpuratus, Lam., \x., p. 158. Whorls slightly rounded, 
smooth, spirally striated ; body whorl slightly keeled; imperforate ; 
Purple, or pinkish-purple, with irregular longitudinal zig-zag reddish- 
purple markings. 
Length, 1°8 ; breadth, 1:4 ; angle of spire, 50°. 
North Island only. Chatham Islands. 
C. purpuratus, Martyn; TZ. elegans, Gmelin; Whorls slightly 
rounded, rough, spirally grooved and obliquely striated ; body whorl 
slightly keeled ; imperforate ; rose-pink or pinkish-white, with longitudi- 
nal flexuous streaks of rose-pink. 
Length, 1°1 ; breadth, ‘7 ; angle of spire, 50°. 
Auckland to Dunedin, rare in the South. 
C. texturatus, Gould, U.S. Ex. Ep., p. 181, f 206. Shell coni- 
cal, imperforate, solid, girded with about five obtuse ribs on the upper, 
and nine on the lower whorls ; colour cinereous, tinted-green or roseate, 
generally faintly tessellated with pale rose spots on the ribs; intercostal 
spaces half the breadth of the ribs ; surface having the lines of growth 
faintly laminated, and crossed by fine revolving lines ; when somewhat 
worn the prominence of the rib becomes smooth, and the cancellated 
sculpture appears only in the interspaces; nacreous underneath, as 
appears by its roseate pearly tip ; whorls 7, scarcely convex, the basal 
one obtusely angular ; aperture nearly circular, somewhat effuse at the 
base ; columella rounded, edged with green ; outer lip bevelled within ; 
interior pearly, faintly greenish, scarcely iridescent; operculum thin, 
horny, multi-spiral (Gould.) 
Axis, 1 inch; diameter, ‘7 inch. 
