DESCRIPTION OF THE FOSSILS. 
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P. depressa. Ph. PI. V. fig. 7- Bolland. 
Depressed ; whorls plane above, convex and concentrically striated beneath ; band 
prominent. 
P. inconspicua. Ph. PI. XV. fig. 8 . Bolland. 
Depressed ; whorls few, convex, band very faintly marked and narrow, longitudinal 
striae distinct, undulated ; aperture transversely oval. 
P. strialis. Ph. PI. XV. fig. 9 . Bolland. 
Shaped as the last, but the spire more acute ; band broad, plain ; surface spirally 
striated. 
P. interstrialis. Ph. PL XV. fig. 10 . Bolland. 
Aperture nearly round ; base convex, spirally striated ; spire conical, acute ; body 
whorl tricarinate, two or three striae between the keels ; longitudinal fimbriated striae. 
P. atomaria. Ph. PL XV. fig. 11 . Bolland. 
Base convex, spire tabulated, two spiral sharp carinee ; surface reticulato-striated ; 
striae punctulated. 
P. sculpta. Ph. PI. XV. fig. 12 . Bolland. 
Spire acute, tabulated; whorls tricarinate; the intercarinal spaces lightly stri- 
ated ; the upper and lower surfaces longitudinally plaited. 
P. lirata. Ph. PI. XV. fig. 13. Bolland. 
Spire acute, conical ; band prominent, with arched striae ; upper surface obliquely, 
lower directly plaited. 
P. undulata. Ph. PI. XV. fig. 14. Bolland. 
Ovate, spire small, acute ; whorls convex ; band broad ; with longitudinal un- 
dulated striae, every third larger than the others. 
P. abdita. Ph. PI. XV. fig. 15. Bolland. 
Depressed ; whorls rounded, with a subsutural band, (hence its name.) 
P. fusiformis. Ph. PI. XV. fig. 16 . Bolland. 
Fusiform ; whorls tricarinate : the lower carina sutural. 
P. squamula. Ph. PL XV. fig. 17* Bolland. 
Conical, whorls obliquely costulated : costulae squamous, entire, or divided, or 
alternately long and short. 
P. monilifera. Ph. Pl. XV. fig. 10 , a. Bolland. 
Whorls bicarinate ; spiral moniliform striae. 
P. limbata. Ph. Pl. XV. fig. 18. Bolland. 
Depresso-conical, whorls costulated as in P. squamula, but nodular on the upper 
and lower edges. 
P. gemmulifera. Ph, Pl. XV. fig. 19 . Bolland. 
Depresso-conical, whorls convex above, flat beneath ; edge nodular ; spiral striae, 
gemmuliferous above. 
G g 
