DOLIIDA. 65 
Length, 2°5; breadth, 1°5 ; angle of spire, 50°. 
North Island. Martin’s Bay. Australia. 
R. vexillum, Sowerby; R. argus, Dief., N.Z.,ii., p. 229; Reeve, 
Conch. Ic., f. 13; Chenu, f. 713; R. tumida, Dunker. Oval, obliquely 
compressed ; whorls spirally striated, some of the ridges sub-nodulose ; 
varices flattened, not centinuous; columella with a thick posterior 
tooth, and a few median wrinkles; outer lip dentate, teeth in pairs ; 
canal short; chestnut-brown, ridges sometimes purplish; varices 
coloured similarly to the rest of the shell ; inside white ; covered with a 
brown hairy epidermis. 
Length, 4 ; breadth, 2°4 ; angle of spire, 62°. 
Tasmania. Auckland to Stewart Island. Chatham Islands. 
In 2. argus the columella is smooth, and the body whorl transver- 
sely plicately noduled. In &. vexz//um the columella is wrinkled, and 
the body whorl is not transversely plicated. Our species varies, some- 
times running into one, sometimes into the other. 
FAMILY—DOLIID:. 
Lingual teeth in seven rows (3. 1. 3.,) central generally toothed, 
lateral in three series, converging, the inner often broad, the two outer 
subulate, versatile. Mantle enclosed, the siphon re-curved ; foot small ; 
operculum none. Shell thin, ventricose ; whorls with transverse ribs ; 
aperture with an oblique notch in front. 
Genus, DOLIUM—Browne. 
Shell ventricose, spirally grooved ; last whorl very large; outer lip 
waved. 
D. variegatum, Zamark, l.c., x., p. 143; Reeve, Conch. Ic., f. 
7. Grooves simple, without any elevated line ; columella smooth, per- 
forated ; suture excavated ; yellowish brown, varied longitudinally with 
darker and irregularly spotted with purplish- brown on the ribs; interior 
yellowish-brown ; columella white. 
Length, 4°75 ; breadth,'4; angle of spire, 120°. 
Smaller and not so much spotted as Australian specimens. 
From the North Cape to Tauranga. Australia. 
FAMILY—CASSIDID. 
Radula short, broad, triangular, with many rows of similar, lancet- 
shaped teeth, and a single small dentated tooth in the central series. 
Mantle enclosed, with a re-curved siphon ; foot large, dilated ; opercu- 
lum annular ; nucleus in the middle of the straight inner edge. Shell 
ventricose, su')-globose ; whorls often variced. 
