30 DUNDET GASTEROPODA . 



Hist. See. XIII., pi. 6, fig. 29, p. 210) if one may judge from 

 descriptions. 



This species is dedicated to Mr. Stoddart, F.G.S., well 

 known to W. of England geologists. 



We have only one specimen. 



Locality— Dundry. . Inf. Ool. 



TrEBO DrNDEIENSIS, n. sp. PI. 2, fig. 2. 



Shell elongate, acutely conical, not umbilicate. Whorls 7 

 angular, outline slightly convex above the keel, and then bending 

 in towards a deep suture ; angle sharp, only one quarter of the 

 distance from the inferior suture. Aperture angular, trapezoidal. 

 Above the keel are three bands or rows of tubercles, that nearest 

 the suture is considerably the strongest; there are oblique 

 transverse lines between these longitudinal ridges. On the base 

 of the last whorl, i.e. below the keel, are nine ridges, the trans- 

 verse lines seem to be continued between these, but they are 

 well preserved only for a little distance below the keel in our 

 specimen. 



There are several shells which come near to this in shape, but 

 which differ in the details of the ornamentation; we may 

 refer to T. imlricatus-iuevicus, Quenstedt, (Jura. tab. 24, figs. 11, 

 12) from the M. Lias; again, it differs from Trochus concinnus, 

 Moore, (Som. N. H. Soc, XIII., pi. 4, figs. 28, 29) in being 

 more acutely conical, as well as in the surface details. Erom 

 Trochus Gaud/ryanus^ D'Orbigny, (Pal. fr. Terr. Jur. 2 Gast., pi. 

 311, figs. 4 — 7) cited from theM. Lias, it is distinguished plainly 

 bv the character of the ornament near the suture. 



This and allied forms might form a distinct genus ; they seem 

 to differ from the recent Turbo. 



There are three specimens in the Musem. 



Locality — Dundry. Inf. Ool. 



