Tornatella. 
MOLLUSCA. 
85 
3. T. cuspidatus —The Pointed Tornatella, pi. XLIII. 
fig. 11, 12. 
Tornatella cuspidatus. Fleming, Brit. An. p. 336. Acteon 
cuspidatus , Sowerby, Min. Conch. V. p. 77, pi. 455, fig. 1. 
Shell smooth, subcylindrical; gradually contracting from the 
centre to the base, which ends in a narrowed point; superior 
portion of the body volution flattened, and rather hollowed 
around the base of the spire; spire conical, consisting of four 
volutions, and terminating in a sharp apex; aperture greatly 
elongated, extending above the body, and much contracted, 
gradually widening as it descends; columella provided with a 
single plait, and an acute spiral edge above it; outer lip slightly 
crenated within. 
Found in the Oolite at Ancliffe. 
4. T. retusus. —The Blunted Tornatella, pi. XLIII. fig. 
13. 
Acteon retusus . Phillips, Geo. of Yorkshire, I. p. 107, pi. 
4, fig. 27. 
Shell subovate, smooth ; body large, vcntricose; spire small, 
consisting of three volutions, terminating in an obtuse apex ; 
aperture subovate; columella with two plaits; outer lip plain, 
and rather acute. 
Found in the Calcareous Grit at Scarborough. 
5. T. elongata. —The Elongated Tornatella, pi. XXXIII.* 
fig. 10, 11. 
Tornatella elongata. J. de C. Sowerby, Geo. Trans. IV. 
2nd series, p. 335, pi. 11, fig. 1. Fitton, lb., p. 363. 
Shell elongated, elliptical; body large; spire short, consisting 
of three or four volutions; aperture elongated, contracted 
above, and wide below'; outer lip slightly thickened; surface 
covered with spiral, regular furrows, crossed by longitudinal 
striae, which do not extend over the intervening ribs. 
Found in the Chalk Marl of the Upper Greensand, Kent. 
6. T. affinis. —The Related Tornatella, pi. XXXIII.* 
fig. 12, 13. 
Tornatella affinis. J. de C. Sowerby, Geo. Trans. IV. 2nd 
series, p. 343, pi. 18, fig. 1). 
Shell ovate; body large; spire short, consisting of four 
gradually tapering volutions, terminating in an acute apex; 
aperture occupying about half the length of the body, ovate, 
contracted above, and gradually widening as it descends, the 
lower part much rounded, and terminating in a truncated base; 
outer lip plain; columella with one single and one double fold ; 
surface covered by numerous, spiral grooves, crossed by many 
longitudinal, somewhat obliepje stride. 
This species has a strong resemblance to Auricula simidata, pi. 
XLVI. fig. 40, 41, but is more elongated, more acute, aud of smaller 
size. 
Found in the Gault, Kent. 
7. T. Popii. —Pope's Tornatella, pi. XXXIII.* fig. 14, 
15. 
Tornatella Popii. J. de C. Sowerby, Geo. Trans. IV. 2nd 
series, p. 347, pi. 23. 
Shell smooth, oblong-ovate; body large; spire small, con¬ 
sisting of about three volutions; aperture oblong, rather wide, 
slightly contracted above, expanding below', and occupying about 
two-thirds of the body ; columella with two plaits. 
Found in the Hastings Sand, Sussex. 
FAMILY IV.—MACROSTOMA. 
Shell auriform, with a very wide aperture, and the 
margins disunited; destitute of a culumella or oper¬ 
culum. 
Genus XLI.—PLEUROTOMARIA .—Dcfranee. 
Shell turbinated, spiral, for the most part trochiform, 
and abruptly conical, and in some species subturreted; 
aperture generally subquadrate, with rounded angles, in 
others more orbicular, and flattened at the base; outer 
lip sharp edged, with a deep slit near its junction with 
the spire; provided with a large umbilicus. 
1 . P. atomaria. —The Atomed Pleurotomaria, pi. XL. 
fig. 1. 
Pleurotomaria atomaria. Phillips, Geo. of Yorkshire, II. 
p. 227, pb 15, fig. 11 . 
Shell ovate; body large, inflated; spire small, consisting of 
three tabulated, rapidly decreasing volutions, terminating in an 
obtuse apex; two sharp spiral carinac traverse the shell; surface 
covered with fine, punctated, spiral, and longitudinal stria}, pro¬ 
ducing an obscure reticulated appearance. 
Found in the Mountain Limestone at Bolland. 
2 . P. undulata. —The Waved Pleurotomaria, pi. XL. 
fig. 2. 
Pleurotomaria undulata. Phillips, Geo. of Yorkshire, II. 
p. 227, pi. 15, fig. 14. 
Shell ovate; body large, venlricose; spire small, consisting 
of two convex volutions, terminating in an acute apex; a single 
broad, Hat band traverses the centre of the body, and lower 
portion of the spiral convolutions; surface covered with lon¬ 
gitudinal, undulating striae, every third one more prominent 
than the others. 
Found in the Mountain Limestone at Bolland. 
3. P. inconspicua. —The Inconspicuous Pleurotomaria, pi. 
XL. fig. 3 and 5. 
Pleurotomaria inconspicua. Phillips, Geo. of Yorkshire, 
II. p. 227? pb 15, fig. 8. 
Shell somewhat depressed; body very large; spire very small, 
consisting of two flattened volutions; convex at the sides ; aper¬ 
ture large, transversely oval, very much expanded; outer lip 
plain; inner lip broadly reflected on the columella; an obscure 
narrow band traverses the centre of the body, and base of the 
volutions of the spire; whole surface covered with distinct, 
undulating, longitudinal striae. 
Found in the Mountain Limestone at Bolland. 
4. P. depressa* —The Depressed Pleurotomaria, pi. XL. 
fig. 4. 
Pleurotomaria depressd. Phillips, Geo. of Yorkshire, II. p. 
227, pb 15, fig. 7. 
Shell depressed ; volutions plane above, convex and concen¬ 
trically striated beneath; with a prominent rounded band 
investing the central portion of the body. 
Found in the Mountain Limestone, Bolland. 
5. P. fibula _The Button Pleurotomaria, pi. XL. fig. 6. 
Pleurotomaria strialis. Phillips, Geo. of Yorkshire, II. p. 
227, pi. 15, fig. 9. 
