Pleurotomaria. 
MOLLUSCA. 
87 
umbilicated, with its edges spirally striated; aperture lunate; 
surface covered with faint lines of grow th, w hich are retroficxed 
in the middle. 
Found in the Mountain Limestone, Bolland. 
17. P. vittata _The Banded Pleurotomaria, pi. XL. 
fig. 21. 
Pleurotomaria vittata. Phillips, Geo. of Yorkshire, IT. p. 
228, pi. 15, fig. 24. 
Shell conical, subturrcted; spire and body of nearly equal 
length; volutions ventricose; abroad, flat, spiral, mesial band 
invests the body, somewhat lower than the centre; surface 
covered with longitudinal, slightly oblique stria?. 
Found in the Mountain Limestone, Ottcrburn and Bolland. 
18. F. sculpta. —The Carved Pleurotomaria, pi. XL. fig. 
22 . 
Pleurotomaria sculpta. Phillips, Geo. of Yorkshire, II. p. 
227, pi. 15, fig. 12. 
Shell conical, elongated; body large; spire small, consisting 
of three slightly inllatcd, tabulated volutions, each furnished 
with three carina?, the spaces between which are provided with 
very delicate striae; upper and under surfaces longitudinally 
plaited. 
Found in the Mountain Limestone, Bolland. 
19. P. interstrialis. —The Iiiterstriated Pleurotomaria, 
pi. XL. fig. 23. 
Pleurotomaria interstrialis. Phillips, Geo. of Yorkshire, 
II. p. 227, ph 15, fig. 10. 
Shell oblong-ovate, pyramidal; spire conical, of medium 
length, consisting of four volutions, terminating in an acute 
apex; body invested by throe rather prominent, spiral carinse, 
each with two or three strong, spiral strife between them; base 
convex, concentrically striate; aperture nearly orbicular; whole 
surface covered with fine, longitudinal, fimbriated stria?. 
Found in the Mountain Limestone, Bolland. 
20. P. caRinata. —The Keeled Pleurotomaria, pi. XL. fig. 
24, 25. 
Pleurotomaria carinata . Phillips, Geo. of Yorkshire, II. p. 
226, pi. 15, fig. 1. JJelix carinatus, Sowerby, Min. Conch. I. 
p. 34, pi. 10, upper and lower figures. 
Shell pyramidal; body large; spire small, consisting of four 
flat-sided volutions, terminating in a rather acute apex; body 
invested by a broad, flat, elevated, spiral, mesial band, emanat¬ 
ing from the superior edge of the outer lip, winding along the 
centre of the body, and continued at the base of each volution, 
until it loses itself in the apical one; portion of the body below 
the band smooth, as well as the base, which is furnished with a 
pretty large, open umbilicus; superior portion of the body and 
spire, as well as the band, covered by oblique stria?; aperture 
large, and expanded laterally. 
Found in the Mountain Limestone at Settle, Yorkshire. 
21. P. tumida. —The Tumid Pleurotomaria, pi. XL. fig. 
2 6 . 
Pleurotomaria tumida. Phillips, Geo. of Yorkshire, II. p. 
22G, pi. 15, fig. 3. 
Shell subdepressed; body large, tumid ; spire short, consist¬ 
ing of three rounded volutions, excavated above, as well as the 
body; a broad, flat, spiral, mesial band invests the centre of the 
body; whole surface covered with nearly obsolete, spiral stria?, 
and with longitudinal arcuated stria?. 
Found in the Mountain Limestone at Bolland. 
22. P. dubia. —The Doubtful Pleurotomaria, pi. XL. fig. 
27. 
Cirrusy probably C. rotundatus. Phillips, Geo. of York¬ 
shire, p. 250, pi. 15, fig. 31. 
Shell cirriform, depressed, smooth; spire small, consisting of 
two flat volutions. 
Found in the Mountain Limestone at Bolland. 
23. P. gemmulifera, —The Gemmed Pleurotomaria, pi. 
XL. fig. 28, 29. 
Pleurotomaria gemmulifera. Phillips, Geo. of Yorkshire, 
II. p. 227, ph 15, fig. 19. 
Shell subconic, subdepressed; body large; spire small; volu¬ 
tions convex above, and flat beneath; edge nodular; aperture 
very large, transversely expanded; the whole upper smface 
covered by gemmuliferous, spiral stria?. 
Found in the Mountain Limestone, Bolland. 
24. P. momlifera. —The Necklace-striate Pleurotomaria, 
pi. XL. fig. 30 and 34. 
Pleurotomaria monilifera. Phillips, Geo. of Yorkshire, II. 
p. 227, pb 15, fig. 10, a. 
Shell oblong-ovate; superior portion of the body and spire 
conical; body with a large, prominent, spiral, mesial band on 
its extreme edge, with a smaller one below, these extend to the 
spire; aperture of moderate size; whole surface covered with 
moniliform, spiral stria?. 
Found in the Mountain Limestone at Bolland. 
25. P. concentrica. —The Concentric Pleurotomaria, pi. 
XL. fig. 31. 
Pleurotomaria concentrica. Phillips, Geo. of Yorkshire, II. 
p. 228, pi. 15, fig. 23. 
Shell turreted; with quadrate, subtabulate volutions above, 
convex below; umbilicus closed ; whole surface covered by 
numerous, strong, spiral sulci, the basal furrows being the 
largest. 
Found in the Mountain Limestone, Bolland. 
26. P. conica. —The Conical Pleurotomaria, pi. XL. fig. 
32. 
Pleurotomaria conica . Phillips, Geo. of Yorkshire, II. p. 
228, pi. 15, fig. 22. 
Shell conical; body ventricose; spire consisting of five nearly 
flat-sided volutions, ending in an acute apex; base umbilicated; 
aperture large, subovate, laterally expanded; a bicarinate, spiral, 
mesial band invests the lower portion of the body, and, ascend¬ 
ing, winds round the base of the volutions of the spire, covered 
with oblique, acutely elevated striae. 
In some varieties the band is tricarinate, with a sulcus separating the 
two superior ones. 
Found in the Mountain Limestone of Derbyshire, and at 
Bolland. 
27. P. limbata. —The Bordered Pleurotomaria, pi. XL. 
fig. 33. 
Pleurotomaria limbata . Phillips, Geo. of Yorkshire, II. p. 
227) ph 15, fig. 18. 
Shell conical, subdepressed 5 spire consisting of five rather 
flat-sided volutions; base of the volutions, as well as the body, 
provided with numerous, oblique ribs; the superior margin ot 
all the volutions nodular; base flat. 
Found in the Mountain Limestone at Bolland. 
