368 GASTEROPODA OF THE INFERIOR OOLITE. 
Opalinus-zone, at Drympton, and from the lowest Murchisonx-zone at Bradford 
Abbas and Halfway House. May be noted in the shell-bed below the Lower 
Limestone at Crickley. It also occurs in the Dogger, and generally in those 
portions which are below the Nerinza-bed, being, on the whole, a fossil character- 
istic of a low horizon. By the gradual rounding of the angles and refinement of 
the ornaments D. angulata passes into the species next described. 
304. De.painuta (Turso) cranata, Hudleston, 1885. Plate XXX, fig. 17. 
1885. Turspo (DELPHINULA) GRaNatus, Bean, MS. Hudleston, Geol. Mag., 
dec. 3, vol. ii, p. 55, pl. ii, figs. 9—12. 
Bibliography, §c-—In the description of this species, two varieties were noticed 
by me. The first of these is more properly D. granata; the second variety 
probably shades off into D. angulata. 
Description : 
Length . : 5 : . 115 mm. 
Width : : é : . 14mm. 
Spiral angle (variable) ‘ : woo" 
Shell turbinate and umbilicate; spire rather more than one-third the total 
height, but variable in this respect, the younger shells being the most depressed. 
Number of whorls in the full-grown shell five, usually flattened towards the apex. 
In those cases where the ornaments of the spire-whorls are preserved, tuberculated 
spirals at the posterior and anterior margins may be noted, but very often adult 
shells (as in the figured specimen) show scarcely any ornament in the whorls of 
the spire. In the more gibbous varieties, where a portion of the base of the 
penultimate is exposed through gaping of the suture, the whorl appears strongly 
carinated. 
Body-whorl large, rounded to subangular and ornamented by a number of 
tuberculated and granular spiral bands. There is generally a compound spiral 
band on the posterior margin; the widest part of the shell is marked by a slight 
carina with conspicuous granulations, below which are other slight keels. The 
base is very full and granulated, the spiral ornaments terminating in a circle of 
tubercles round the deep and funnel-shaped umbilicus. Aperture as in the pre- 
ceding species. 
Relations and Distribution.—This is so variable a species that scarcely any two 
shells are alike. It is more rounded in outline, and the ornaments are of a more 
granular character than is the case with the forms previously described. 
Fairly abundant in the Dogger, D. granata is elsewhere represented by allied 
