DELPHINULA. 367 
culated spirals at the posterior and anterior margins, the interspaces being richly 
interwoven with fine granular ornaments; sutures regular and canaliculate. 
Body-whorl large, subangular and bicarinate, the tuberculated carine being 
equal and approximate ; a granulated spiral belt adorns the posterior margin. The 
tuberculations on the carine are radially elongate, and the entire surface of the 
shell, including the full base, is richly chased with granular spiral ornament. A 
system of radiating tubercles encircles the somewhat restricted umbilicus ; aperture 
circular to subquadrate. 
Relations and Distribution.—Strictly speaking, this may be regarded as a megalo- 
morph of Twrbo (D.) Shalevi, although there are many points of difference. Yet 
varieties classed with T. Shaleri seem to lead up to this form, which occurs in the 
same beds, though more sparingly. Found at Stoford and in the Concavus-bed at 
Bradford Abbas. 
303. DELPHINULA ANGULATA, sp. nov. Plate XXX, figs. 15 and 16. 
Description.—There are two well-marked varieties in this species, an elevated 
form with larger tuberculations (Fig. 15), and a depressed form with finer tubercu- 
lations (Fig. 16). It is to the former and more common variety that the subjoined 
description particularly applies. 
Height ; : ; : = Amin: 
Width : : : : . 14mm. 
Spiral angle . : . 90°—95° 
Shell conical, turbinate, umbilicated ; spire about one-third the total height, 
obtuse, but with a sharp apex. Number of whorls five to six, richly ornamented 
with finely tuberculated spirals at the posterior and anterior margins, the inter- 
vening area being very concave; sutures canaliculate, but not very wide. 
The body-whorl is very angular, owing to the large and equal double keels, 
which are rather wide apart. There is a granulated spiral belt on the posterior 
margin of the body-whorl, and the space between this and the upper keel is very 
concave ; the keels are richly tuberculated, the upper one being rather the stronger ; 
the base is very full and, together with the rest of the shell, spirally striated and 
slightly decussated. The deep and funnel-shaped umbilicus is encircled by a girdle 
of axially-extended tubercles, fairly wide apart. Aperture circular to subquadrate. 
Relations and Distribution.—Distinguished from D. Shaleri and var. pulchrior 
by the very concave whorls, biangular outline, and round or granular character of 
the tuberculations. 
This species is rather widely distributed. The best specimens come from the 
