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 carinas being 

 equal and approximate ; a granulated spiral belt adorns the posterior margin. The 

 tuberculations on the carina? 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 Turbo (D.) Shaleri, 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 . . . . .11 mm. 



Width . . . . .14 mm. 



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 



