Natica. 
MOLLUSCA. 
S. pulclira. Sowerby, Geo. Tr. 2nd Ser. IV. p. 343, pi. 18, 
fig. 11. 
Elongated, 'with ten close volutions, crossed by blunt longi¬ 
tudinal ribs; a band connecting the ribs, passes along the 
bases of the volutions; spire acute, aperture sub-ovate. 
The Greensand, Blackdown. 
1. Cirrus Gloveri. —Glover’s Cirrus, pi. XXI.* f. 40, 47. 
C. Gloveri. Brown, Tr. Man. Geo. Soc. I. p. 223, pi. 7, 
figs. 46, 47. 
Shell conoidal, smooth, glossy; body very large, much 
intlated; spire very small, consisting of three rapidly diminish¬ 
ing, ventricose volutions; aperture round; inner lip slightly 
reflected on the columella, with a shallow umbilicus behind it; 
outer lip thin, and even. Length three-eigliths of an inch, 
diameter three-sixteenths of an inch. 
Found at High-Green Wood, near Hebden Bridge. In the 
Manchester Museum. 
Named in honour of my much respected friend, Thomas 
Glover, Esq., of Smedley Hill, Manchester. 
1. Tornatella striata. —The Striated Tornatella, plate 
XLIII. figs. 14, 15. 
Action striatus. Sowerby, IV. p. 37, pi. 460, fig. 2. 
Regularly ovate; spire with four rather flat volutions, ter¬ 
minating in rather an acute apex ; columella with an indistinct 
plait; whole surface covered by rather regular transverse stria?, 
which are nearly obsolete on the middle of the body, but strong 
on the base; aperture ovate, pointed above, and occupying 
more than half the length of the shell. 
The Red and Coral Crags, Sutton. 
1. Pleurotomaria undata. —The Waved Pleurotomaria, 
pi. XXXIII.* fig. 12. 
P. undata. Sowerby, Sil. Syst. p. 619, pi. 8, fig. 13. 
Ventricose, sub-conic, consisting of four inflated volutions; 
body large, spire small, with an obtuse apex ; base convex ; 
surface with many longitudinal curved, oblique, slightly pro¬ 
minent undulations; lip with a deep sinus, forming a narrow, 
hardly elevated, band around the volutions; aperture orbicular. 
The Lower Ludlow Rock, near Ludlow, Presteign, and 
Deans Corner. 
2. Pleurotomaria Lloydii. —Lloyds Pleurotomaria, pi. 
XXXIII.* fig. 85. 
P. Lloydii. Sowerby, Sil. Syst. p. 619, pi. 8, fig. 14. 
Conical, sub-turreted; body long, spire short, consisting of 
255 
four volutions, ending in an obtuse apex ; a narrow prominent 
band, formed by the filling up of the marginal sinus; surface 
with five transverse keels, or ribs, the intercostal spaces nu¬ 
merously striated; aperture oblong-ovate, a little narrowed 
above. 
The Lower Ludlow Rocks, Shelderton Hills, near Aymestry, 
and Dean’s Corner. 
3. Pleurotomaria angulata. —The Angled Pleurotomaria, 
pi. XXXIII.* fig. 84. 
P. angulata. Sowerby, Sil. Syst. p. 641, pi. 21, fig. 20. 
Conical, acutely angled in the middle of the volutions ; the 
surface probably striated; aperture nearly circular, with an 
angle at its upper part. A cast only. 
In the Lower Silurian Rocks, Mandiuam, Llandovery. 
4. Pleurotomaria gigantea. —The Gigantic Pleurotoma¬ 
ria, pi. XXXVII* fig. 29. 
P. gigantea. Sowerby, Geo. Tr. 2nd Ser. IV. p. 339, pi. 
14, fig. 16. 
Conical, with straight sides, and the volutions over-lapping 
each other; lip with a deep sinus ; band transversely striated : 
whole surface concentrically striated; height and breadth 
nearly equal. 
The Lower Greensand, Bougliton, Kent. 
1. Velutina undata. —The Waved Velutina, pi. XXXIII.* 
fig. 80. 
V. undata. Brown, Wern. Mem. VIII. pi. 1, fig. 15. 
Nearly orbicular; spire exceedingly small, placed laterally 
and sunk beneath the expansion of the outer lip ; apex de¬ 
pressed ; the whole shell covered with strong longitudinal 
wrinkles, following the lines of growth, and crossed by wide 
obsolete, spiral stria?; aperture sub-orbicular, extremely large ; 
pillar-lip broadly reflected on the columella, distinctly relieved 
from the body behind, and a semi-lunate broad groove in its 
centre. 
In the Pleistocene Marine Formation, Dalmuir, Renfrew¬ 
shire. 
1. Natica clausa. —The Close Natica, pi. XXXIII * f. 70. 
N. clausa. Brown, Wern. Mem. VIII. pi. 4, fig. 16. 
Ovate, with five volutions, those of the spire, which is very 
short, slightly produced ; somewhat depressed; grooved above, 
and well-defined by the suture; aperture oblique, semi-ovate, 
a little flattened on its interior side; pillar-lip broadly reflected 
on the columella, behind which is a closed umbilicus; surface 
with very delicate longitudinally oblique stria?. 
In the Pleistocene Marine Formation, Dalmuir. 
2. Natica minima. —The Least Natica, pi. XXI.* figs. 63, 
64, 65. 
