50 MOLLUSCA FROM THE GREAT OOLITE. 
In this large species the volutions are high and globose, the base of the shell is rather 
contracted. 
Locality. The few specimens found, have been obtained from the planking; the fine 
example figured is from the hard weatherstone of Bisley Common. 
Cuemnitzia Hamptonensis. Plate VII, figs. 1, 1a. 
C. Testé elongato-conicd, spird mediocriter obtusa; anfractibus (10—11) plans et 
costatis; costis longitudinalibus (20—22) numerosis, rectis, vel subflexuosis; apertura parva, 
clliptica. 
Shell conical, but much elongated; spire, with the apex, somewhat obtuse; whorls 
(10—11) flattened and costated ; costee numerous, perpendicular, but slightly bent in the 
middle, inclining from left to right ; aperture small, and elliptical. 
The whorls are narrow, their axis being equal only to half their transverse diameter ; 
the cost are narrow, and moderately elevated in young specimens, but after seven 
volutions have been formed, became much more faintly marked, and finally are obsolete ; 
the less subulate form and very narrow whorls separate it from Zerebra vetusta (Phil. Geol. 
York., t.9, f.11), to which the markings upon its surface have a near resemblance. 
Axis of largest specimen 15 lines; transverse diameter 5 lines. 
Locality. Minchinhampton Common and vicinity, where it is moderately rare: it is 
usually found in the soft oolite beneath the planking. 
Cuemnirzia Leckensyt. Plate VII, fig. 4. 
C. Testé parvd, levigati, subulatd ; anfractibus numerosis, subplunis, superne converts, 
anfractu ultimo symmetrico. 
Shell small, smooth, subulate, acute; whorls numerous, narrow, flattened, except upon 
their upper portions, where they are convex ; the last whorl symmetrical. 
This small species approaches in figure two contemporaneous:species, viz., the young 
state of Nerinea Voltzii and of Eulima? communis; from the former of these it is dis- 
tinguished by the greater flatness of the whorls; from the young state of the latter by the 
much greater number of whorls, more subulate form, and acute apex. Axis 33 lines. 
Locality. Minchinhampton Common. 
CHEMNITZIA WETHERELLIS. Plate VII, figs. 5, 5a. 
C. Testé cylindrico-elongata ; anfractibus numerosis (12) subconveais, longitudinaliter 
costatis ; costis (14) rectis obtusis ; apertura parva, ovata. 
Shell cylindrical, elongated, whorls numerous (about 12), somewhat convex, longi- 
tudinally costated ; costee perpendicular, obtuse, closely arranged, about 14 in a volution ; 
aperture small, ovate. 
