299 
lations, which gradually become more numerous and costu- 
late; in the next whorl they become more distant again, and 
remain throughout the shell as feeble axial angulations which 
are just visible when looking at the shell from the apex. The 
spire-whorls are subconyex, subangulate just below the 
middle, and have the upper fourth somewhat adpressed just 
below the simple impressed suture. Aperture oblique oblong- 
ovate; canal short, wide, scarcely notched; outer lip solid 
but sharp, with a deep round sinus separated from the as- 
cending suture by a callus from the posterior part of the 
inner lip, then straightly convexly antecurrent to two ghal- 
lower sinuses at the base of the canal; inner lip a complete 
smooth thin applied glaze, thickened behind. Spiral in- 
cisions, which begin in the second half of the first sculptured 
protoconchal whorl, cut the surface up into flat slightly round- 
ed ribs, increasing to eleven in the penultimate and twenty- 
four in the body-whorl, the second below the suture and that 
at the angulation being the widest. Microscopic accremental 
striz scratch the whole surface and have the sinuosities of 
the outer lip. A narrow white spiral, articulated with brown, 
ornaments the angulation ; with a fainter narrower one above, 
and a rather wider brown spiral articulated with white runs 
from the back of the aperture over the dorsum nearly to 
the lip margin. The general colour is brown, with darker 
irregular spots and clouds. 
Dim.—Length, 79 mm.; of body-whorl, 4°7 mm. ; 
breadth, 2 mm. 
Locality.—Type alive in 20 fathoms 7 miles south-west 
of Newland Head; in 40 fathoms off Beachport, 3 fresh and 
3 poor; in 55 fathoms off Cape Borda, 1 fresh: in Gulf St. 
Vincent at unrecorded depth, 1 fresh. 
One example shows some ten previous labral edges in 
the body-whorl, sinuously marked out in white, and followed 
by deep-brown, which gradually fades out at the next labral 
edge. The affinity of this species is close to D. agrestis, which 
may possibly be a rude costate variant. 
Ausmovrillia agrestis, n. sp. Pl. xxvii., fig. 7. 7 6 Ly 
Shell solid, rugged, elongate-fusiform, of 74 whorls, in- 
cluding the protoconch of one whorl and a half, smooth, 
round, and blunt. Spire-whorls sloping, scarcely concave in 
the upper part, convex in the lower. Suture distinct, with 
a narrow adpressed margin. Body-whorl concavely attenu- 
ated at the base. Aperture obliquely oval, shortly contracted 
posteriorly ; canal short, open, barely notched. Outer lip 
sharp, slightly ascending at the suture, with the posterior 
