360 GASTEROPODA OF THE INFERIOR OOLITE. 
Bibliography, §c.—In adopting the above name I wish to indicate that a certain 
form is widely, though not abundantly, spread throughout the Lower Oolites, which 
undoubtedly belongs to the group of which the Corallian species, D. funata, Miinst., 
is a member, but yet is not the same species. The question calling for immediate 
decision is, what shall we call this fossil? On the whole, it seems to me that 
Turbo Hamptonensis may be made to cover the ground with the reserve, ‘ Inferior 
Oolite variety.” 
Description.—Height 11 mm., width 10 mm., but variable in this respect ; 
spiral angle 65°. Shell conical, moderately umbilicated. Spiral angle fairly 
regular, but with a flattened apex. Number of whorls usually five, those at the 
apex smooth, the others richly ornamented with tuberculated spiral bands, about 
three in number on the penult and antepenult ; sutures wide and in some cases 
almost gaping. 
The body-whorl is about half the entire height, subventricose, and carries four 
tuberculated spirals on the flank, which is in some specimens somewhat bicarinated. 
Base rounded and studded with tuberculated spirals, of which the lowest, dis- 
tinguished by larger granulations, forms a prominent demilune at the margin of 
the umbilical cavity. The aperture is subcircular, the outer lip thin and 
crenulated ; the inner lip is slightly angular towards the columellar extremity, 
where there is a sort of thickening. 
Relations and Distribution.—The above diagnosis represents a more vigorous 
form than Turbo Hainptonensis, which was described from a single specimen in the 
Great Oolite of Minchinhampton. A still smaller variety is Turbo Burtonensis, from 
the Forest-Marble. Not always to be distinguished from Monodonta Lyelli, 
and intimately connected with Turbo Davoustii, which is probably nothing more 
than an exaggerated and squamose variety. 
Rare in Dorset; occurs at different places and on different horizons in the 
Cotteswolds. Some of the most characteristic specimens are from the neighbour- 
hood of Hook Norton, where it is not always easy to distinguish it from Monodonta 
Lyell, Varieties from the Dogger and Cornbrash of Yorkshire have been figured 
by me in the ‘ Geological Magazine’ (vol. cit.). 
296. Turso (DeLpuinuta) Davoustu, d@’Orbigny, 1850. Plate XXX, fig. 7; and 
var. Lindonensis, fig. 6. 
1850. Turso Davousrtit, d’Orbigny. Prod., i, p. 266. 
1852. _ = — Terr. Jur., vol. 11, p. 344, pl. ecexxxi, figs. 
7—10. 
Bibliography, §c.—This is perhaps the form recognised by Lycett (‘ Proc. 
Cotteswold Nat. Club,’ vol. i, p. 71) as Delphinula funata, Goldfuss, and also by 
