223 
ed, so as nearly to cover the perforation. The inner lip, ap- 
plied to the base, extends from the columella to the suture, 
and is smooth. - 
Dim.—Height, 3°5 mm.; greatest diameter, 2°4 mm. 
Locality.—300 fathoms, off Cape Jaffa, 10 dead. 
Diagnosis.—_It approaches S. elegans, Jeffreys, Proc. 
Zool. Soc., 1876, p. 200; Tryon, Man. Conch., vol. ix., p. 47, 
pl. viii., fig. 75; but is distinct in having the sutural sinus 
with a much smaller lamina between it and the suture, the 
sloping part of the spire-whorls longer, a different relation of 
the angulation and carine to sinus, and a less production of 
the baso-labral angle. It is also very similar to Seguenza 
monocingulata, Seguenza, as figured by Dall.in Bulletin 37, 
1889, of the United States Nat. Hist. Mus., p. 142, pl. Ixii., 
figs. 88-89 ; but the sinuses in the aperture are different. They 
differ greatly, however. in the two figures given, so this 
species may prove eventually only a variety. 
Keegllar iio Srpponarsa, Sowerby. Y [4 
Siphenaria stowze, spec. nov. PI. vill., figs. 3 to’8. 
Shell small, moderately solid, oval, depressed. Apex sub- 
terminal one-eighth distant from posterior end, slightly to 
the left of the mid-line, oblique, inclining backwards from 
the central line, pointed and slightly projecting posteriorly. 
Posterior end nearly vertical, slightly concave. Dorsum sub- 
convex, more rapidly descending anteriorly. Left margin | 
straightly convex; right more rounded, faintly bulged at the 
site of the siphon, just in front of the middle point. Nume- 
rous subdistant rather rude ribs, equal in width to the inter- 
Spaces, multiplying by frequent intercalations ; rough, irregu- 
lar growth lines. Interior smooth, margin invalidly crenu- 
lated. Ornament, ribs opaque white; dark brown specks, 
lines, and blotches, chiefly intercostal, plainer on the right — 
side; internally light horn tint, a chestnut horseshoe around 
the posterior third, and broken blotches on each side of the 
siphon, 
Dim.—Length, 75 mm.; breadth, 5°9 mm.; height, 3°25 
mm. The radula contains about 94 rows of teeth, each con- 
sisting of a central denticle, with about 22 laterals on either 
side. The rachidian is narrow, with a small cusp tending to 
be bilobed. The laterals have large simple cusps, and these 
as well as the teeth grow gradually smaller the further they 
are from the centre. (Figs. 6, 7, 8.) 
Hab.—Pondolowie Bay, in Spencer Gulf, on rocks above 
tide mark; 9 examples, alive. Fry in shell sand, King’s 
Point, Encounter Bay (Miss Stow). 
