Hurron.—On the Silt Deposit at Lyttelton. 411 
Odostomia sherriffi, sp. nov. 
Shell subulate, tapering: whorls fifteen, smooth, flattened and polished, 
the suture deep. Aperture ovate; peritreme not continuous; columella 
with one strong plait. 
Length, +55 inch ; breadth, :17 inch. 
Named after Mr. G. Sherriff, of Wanganui. 
Trochita inflata, sp. nov. 
Shell subglobose; whorls two and a half rounded; the last inflated, 
with four or five distant, narrow, spiral ribs erossed obliquely by lines of 
growth: apex lateral. Aperture ovate, the lamina concave. 
Height:4 inch. Length of aperture °88 ; breadth *72. 
This species has externally the appearance of a Natica, but the gurface 
is not polished. 
Anthora conica, sp. nov. 
Shell conical, high; whorls seven, slightly convex, with fine spiral 
moniliform ribs, about eight on the penultimate whorl; suture deep; base 
of the last whorl spirally striated with moniliform stris, the angle rounded. 
Axial cavity deep, smooth, conical ; columella with a slight posterior fold. 
Height :84 inch; breadth, ‘84 inch. 
This species has the smooth axial cavity of 4. tiarata, but it is larger, 
higher, the granulations finer, and the basal angle much more rounded. 
Norz.—In addition to these new species there was in the collection a 
specimen of what I take to be Siphonaria fuscozonata, Angas (P.Z.8., 1865, 
p. 56), which appears to be the same as Fusus minutisquamosus, Reeve. 
Art. L.— Note on the Silt Deposit at Lyttelton, By Prof. F. W. Hutton. 
(Read before, the Philosophical Institute of Canterbury, 6th April, 1882.) 
Ix cutting back the hill on the west side of Lyttelton Harbour to make room 
for the dock, an excellent section has been exposed of the silt deposit and 
the rocks underlying it. An uneven surface of voleanic rocks is covered by 
the silt, which is distinctly stratified, and dips at an angle of 8 degrees to 
the north-east, that is towards the harbour. In 1878 the cutting behind the 
La 
\ SA EN 
7 EN 
LN P : cm, A ee 
me Ya AT K AA " 
Fig. 1. «, silt deposit ; b, volcanic rocks. 
