﻿AMBERLEYA. 291 



numerous and variable, and, as the suture gapes very much, spirals are sometimes 

 seen below the keels. 



The body-whorl is globose, the spirals, including those in the base, being 

 sometimes twenty in number. The sub-eucycloid character of the spire is more 

 or less lost. The two posterior spirals are more strongly tuberculated than the 

 others. Fine axial striae are conspicuous in well-preserved specimens. Aperture 

 ovate to subcircular, with a very short columellar lip. 



Relations and Distribution. — This shell approaches Amberleya {Turbo) Milleri, 

 which is more trochiform, has a wider spiral angle, and a less gaping suture. 

 There is, however, in Amb. turbinoides an amount of irregularity such as tends to 

 the suspicion that the name may represent a group of aberrant forms rather than 

 a distinct species. It also has affinities with Amb. densinodosa. From Turbo 

 modestus, Heb. and Desl., it is clearly distinguished by the irregularity of the 

 whorls of the spire. 



There are four specimens in my collection from Stoford and Bradford Abbas. 

 224. Amberleya (Turbo) Stoddarti, Tawney, 1873. Plate XXIII, fig. 11. 



1873. Turbo Stoddaeti, Tawney. Dundry Gasteropoda, p. (29) 21, pi. ii, fig. 1. 

 Cf. . — modestus, Heb. and Desl. Foss. Montreuil-Bellay, p. 57, pi. iii, 



fig. 2. 



Bibliography, Sfc. — Mr. Tawney described his species from a single imperfect 

 specimen in the Bristol Museum, smaller than the one figured above, and differing 

 from it to a certain extent in the alternately stronger and fainter spirals. If the 

 form figured in the plate is not fairly referable to Turbo Stoddarti, it may be 

 accepted as an Inferior Oolite variety of Turbo modestus. 



Description : 



Length . . . . .30 mm. 



Length of body-whorl to total height . . 55 : 100. 



Spiral angle . . . .56°. 



Shell turbinate, thin. Number of whorls about eight, convex, and ultimately 

 globose ; suture distinct. The ornaments consist of about ten fine and evenly 

 nodulated spirals of nearly equal prominence, the interspiral striae being fine and 

 regular. In some specimens are faint secondary spirals. 



The body- whorl is rather more than half the height of the entire shell, ventri- 

 cose, and has about ten spirals, of which two pairs, on either side of a line of 

 tubercles in the centre, are slightly distinguished from the rest (sub-eucycloid). 

 There are about fourteen finely granulated spirals in the very full and rounded 

 base. 



