GASTEROPODA. 41 
NatIca. 
Shell subglobose, thick, smooth ; spire pointed, more or less elevated, of few volutions ; 
aperture large, oblique, ovate, entire ; columella lip oblique, thickened, the umbilicus being 
nearly covered by a deposition of shelly matter upon the columella; outer lip simple, 
smooth. 
NavIca INTERMEDIA. Plate VI, figs. 1, la. 
NV. Testa ovata, spird elatd, anfractibus (5) convexis, angustis, superne planis ; averturd 
ovato-elongatd, basi lata. 
Shell ovate, spire elevated, whorls (5) convex, narrow, flattened above ; aperture ovately 
elongated, base wide. 
The general contour of this shell approaches nearer to Watica adducta, Phillips, than 
any other Great Oolite species which we have examined. Its position is intermediate to 
that species and our Watica Stricklandi, which latter species is more elongated. In all 
these shells the upper portion of the whorls is horizontal; but in WV. adducta it is even 
depressed as it approaches the suture, forming a narrow channel. JV. intermedia is more 
ovate, or less globose, than NV. adducta. Yn that species the transversal is equal to the 
longitudinal diameter ; but in JV. ¢xtermedia the dimensions are as follow: Length 2 inches, 
breadth 1 inch 7 lines. 
Locality. The planking of Minchinhampton Common has supplied the few specimens 
we have met with. 
Natica Granpis, Goldf. Plate VI, fig. 12. 
Natica GRaNpIS, Goldfuss. Petref., iii, p. 118, t. 199, fig. 8. 
_ — Bronn. 1848. Index Palzont., p. 783. 
NV. Testa globoso-depressd, spird subexsertd, anfractibus convexiusculis, ultimo anfractu 
ventricoso ; margine depresso ; apertura semilunari ; umbilico tecto. 
Shell globose, depressed; spire little elevated; whorls rather convex, their margins 
rather depressed, the last volution ventricose ; the aperture large, semilunar ; the umbilicus 
covered by a callosity of the lip. 
We have only met with three examples of this species: two of these were obtained 
from the upper limestone beds, the other from the planking. The general form is more 
ventricose, and the last whorl more expanded, than either of our other species. ‘The nearest 
approximation to it is the Vatica adducta, Phillips, of which, possibly, our shell may only 
exhibit a more advanced stage of growth; but as the spire of that species is more produced, 
and as our shell perfectly agrees with the species figured by Goldfuss, we prefer, for the 
present, to retain his designation. 
Locality. Minchinhampton. 
