MOLLUSCA. 
ScALARIA- 
251 
Conical; spire abruptly tapering, with about five rounded 
volutions: aperture orbicular; umbilicus closed; length one 
inch, width four lines. 
The Upper Ludlow Rocks, Larden, near Ludlow, &c. &c. 
3. Turbo expansa. —The Expanded Turbo, pi. XXXIII. 
tigs. 54, 55. 
T. expansa. Brown, Wern. Mem. VIII. pi. 1, figs. 12, 13. 
Body very large , spire small, with an acute apex; aperture 
sub-orbicular; inner lip thickened and slightly concave; surface 
minutely striated spirally, alternately larger and smaller. 
The Pleistocene Marine Formation, Dalmuir, on the Clyde. 
Genus PYRAMIS.— Broun. 
Shell generally subulate, gradually tapering to a point; body 
usually short, and the spire long ; volutions but slightly divided 
by the suture in most species, and seldom inflated; aperture 
mostly oblong-ovate, placed nearly perpendicular, with its upper 
angle contracted for the most part; outer lip rarely continuous. 
1. P vram is reticulatus. —The Reticulated Pyramis, pi. 
XXI.* figs. 42, 43. 
P. reticulatus. Brown, Tr. Man. Geo. Soc. p. 222, pi. 7, 
figs. 42, 43. 
Shell subulate ; body shorter than the spire, which consists 
of six inflated, rapidly decreasing volutions, well defined by a 
deep suture, and terminating in an acute apex; aperture slightly 
ovate, contracted above, and rounded below; pillar lip not 
reflected on the columella; outer lip thin, plain, and sharp on 
the margin ; whole shell decussated with fine distinct, spiral, 
and longitudinal stria). Length five-eighths of an inch, diameter 
nearly three-eighths. 
In the Coal Shale, Crimsworth Dean, near Ilebden Bridge, 
and is in the Manchester Museum. 
2. Pyramis Owexi. —Owen’s Pyramis, pi. XXL* f. 44, 45. 
P. Oweni. Brown, Tr. Man. Geo. Soc. I. p. 223, pi. 7, 
figs. 44, 45. 
Shell subulate, smooth; body short, about a third of the 
length of the shell; spire long, and consisting of six well 
defined, moderately inflated, and slightly oblique volutions, 
terminating in an obtuse apex; aperture sub-rotund, a little 
contracted above, rounded beneath; outer lip strong, and even. 
Length a quarter of an inch, diameter a tenth of au inch. 
In the Coal Shale, Crimsworth Dean, near Ilebden Bridge, 
and is in the Manchester Museum. 
1. Littorina striatella. — The Fine-Striated Littorina, 
pi. XXXIII.* fig. 72. 
L. striatella. Sowerby, Sil. Syst. p. C42, pi. 19, fig. 12. 
Conical, with three or four much-inflated volutions; base 
convex; surface with fine longitudinal lines of growth. 
The Lower Silurian Rocks, Horderly and Wistantow, Wales. 
2. Littorina punctura. —The Punctured Littorina, plate 
XXXIII.* fig. 57. 
L. ’punctura. Bean, Mag. Nat. Hist. 1839, p. 02, fig. 23. 
Sub-conic, ventricose ; body and spire nearly of equal length, 
the latter with five inflated volutions ; surface with numerous 
regular longitudinal lines of small punctures. 
In the Cornbrasli, Scarborough. 
3. Littorina breve. —The Short Littorina, pi. XXXII. 
fig. 14. 
Buccinum breve. Sowerby, VI. p. 128, pi. 500, fig. 3. 
Nearly globular; spire short, consisting of three moderately 
rounded volutions, scalloped on their upper edges as they pass 
over a row of obtuse tubercles; body with three or four trans¬ 
verse remote rows of blunt tubercles; aperture sub-orbicular, 
with a slight hollow at its upper angle. 
In the Carboniferous Limestone, Bradley, near Newton 
Bushel, Devonshire. 
1. Trociius Tatiiami. — Tathanrs Troclius, pi. XXXIII.* 
figs. 50, 51, 52. 
Sub-conic, with five slightly inflated volutions, terminating 
in a rather obtuse apex ; aperture transversely ovate; outer lip 
blunt; surface smooth, with a few slight liues of growth, and 
a hollow zone around the body. 
The Carboniferous Limestone, near Settle, Yorkshire. 
2. Trociius inflatus. —The Inflated Trochus, pi. XXXIII. 
figs. 00, 61. 
T. in flatus. Brown, Worn. Mem. VIII. pi. 1, figs. 10, 11. 
Sub-conic, with five tumid volutions, deeply defined by the 
suture ; base largely umbilicate; aperture somewhat quadran¬ 
gular, pearly within surface covered with strong spiral striae, 
and intermediate smaller ones, crossed by extremely minute 
longitudinal stria); the superior edge of each volution with a 
series of iudistinct tubercles. 
The Pleistocene Marine Formation, Dalmuir, on the Clyde. 
3. Trociius iielicites. —The Helix-like Trochus, plate 
XXXIII.* figs. 59 and 04. 
T . helicites. Sowerby, Sil. Syst. p. 003, pi. 3, figs. 1 e and 5. 
Depressed above, convex beneath; smooth, with four volu¬ 
tions, which are rather flattened above, obtusely angular at the 
margin of the base ; umbilicus small and deep. 
In the Old Red Limestone, Horeb Chapel, Felindre. 
1. Scalaria pulchra. —The Handsome Scalaria, plate 
XXXIII.* fig. 63. 
