142 
whorl to meet the outer lip. Notch well marked. Orna- 
ment, five spiral rows of quadrate rufous spots, one imme- 
diately below the suture, and one just above the notch, from 
eight to ten spots in each row. Length, 24 millimetres; 
breadth, 15; aperture, 16 by 7. 
Hab.—Dredged in Investigator Strait, Backstairs Pas- 
sage, and off Point Marsden, Kangaroo Island ; in 15, 16, 17, 
19, and 20 fathoms; 22 individuals, young and mature, alive 
and dead. 
Diagnosis.—From Cassis pila, Reeve. It is more ovate, 
much less globular, and has no varix on the outer lip, which 
is sharp and peculiarly sinuous. From C. Adcocki, Sowerby. 
It is more elongate, has no longitudinal plice, the whorls are 
not angulated nor concave below the suture, there is no thick, 
granulated, infra-sutural band, there are no nodules on the 
last whorl, the labrum is not thickened, but is sinuous. It is 
not represented in the British Museum. 
Its radula shows a single rachidian tooth, with a long, 
central cusp, and six gradually decreasing cusps on each side; 
a long lateral tooth, with about thirteen cusps, sloping 
obliquely inwards, and two uncini, not quite equal in size. 
Variety A.—1s slightly narrower, being 19 mm. by 11, in- 
stead of 12. In place of five rows of rufous spots there are 
oblique, wavy, or curved brown radial bands, starting from 
a row of spots below the suture. 
Obs.—The largest specimen is 27°5 mm. in length. When 
mature or senile there is a marginal linear thickening out- 
side the labrum, which becomes well bevelled inside. In liv- 
ing specimens the ground tint is light pinkish brown, deeper 
on the nucleus and the earlier whoris. The number of spots 
in a spiral row varies considerably, even in the same shell, 
trom./ to 15. 
Cancellaria pergradata. sp nov. Pl. xxvi., fig. 19. 
Shell small, solid, brown, fusiform. Nucleus prominent, 
one turn and a half, apex imbedded, smooth, light horn 
colour. Spire whorls, three and a half, sharply angled. Be- 
hind the angle tabulate, with one tuberculate spiral lira. 
At the angle a stout spiral cord, coronate with about 25 
sharp tubercles. Penultimate, with four very valid spiral 
ribs, not quite equal in width to the interspaces (which are as 
deep as wide), validly tuberculate, by narrow axial striæ, 
running from suture to suture, very obliquely from posterior 
suture to angle. 
