GASTEROPODA. 35 
whorls is nearly smooth. It occurs in all the shelly beds of the formation in Minchin- 
hampton district, and may be discovered in every quarry, sometimes in great numbers. 
The smallness of the object, and the state of preservation, renders it difficult to obtain 
a good section of the interior; the folds upon the columella have been but imperfectly 
disclosed, but there is little doubt that they are as above described ; the aperture is usually 
more narrow than is represented at fig. 8a. 
Locality. Minchinhampton Common; Eparcy, France. 
NERIN#A STRICKLANDI. Plate VII, fig. 9, 9a. 
NV. Testa cylindrico-subulatd, anfractibus latis, planatis, superne leviter convexis, suturis 
profundis impressis ; cingulis scabris aut crenulatis, numerosis et approximatis, superne 
evanescentibus : apertura, plicisque ignotis. 
Shell cylindrical or subulate ; whorls wide, numerous, flattened, or very slightly convex 
on their upper portions, their sutures strongly marked; the whorls are encircled with 
numerous, closely-arranged, scabrous, or crenulated lines, which are nearly obsolete upon 
their upper portions: aperture and plices unknown. 
The character of the surface much resembles Cerithiwm tortile, Deslongchamps ; but the 
whorls in that shell are much more convex and narrow; in the present species the length 
of the whorls perpendicularly is about equal to their transverse diameter. 
Locality. The Stonesfield slate on the borders of Minchinhampton Common has 
furnished our specimens ; they have occurred rarely, and only in fragments; when perfect, 
the length must be considerable. 
Nerina punotata, Voltz. Plate VII, fig. 10, 10a, 4, c. 
Nerina punotata, Voléz. and Bronn. Jahrb., 1836, p. 559, t. 6, fig. 23. 
a — ° Bronn. Index Palzont., p. 803. 
NV. Testa turrito-conicd, anfractibus sub-gradatis, cingulatis, cingulis binis ternisve nodu- 
losis ; columella solida, biplicatd, labro dextro uniplicato. 
Shell elongated, conical, with a regular spiral angle of about 18°; whorls flat, pro- 
jecting at the upper part beyond the whorl above, and thus giving a step-like outline to the 
shell; ornamented with two or three transverse finely-knotted rings: columella solid. 
Three internal folds, viz.: one strong sharp fold on the middle of the outer lip; one smaller 
fold on the columella, a little lower than the former, and a blunt thick fold on the top of 
the whorl near to the columella. Aperture rhomboidal, rather higher than wide. 
This is a more regular and elegant shell than JV. Voltziz, to which it is so nearly allied, 
that worn specimens of the two species may easily be confounded: in that case the 
NV. punctata may be distinguished by its step-like outline, flatter base, and longer and 
