PSEUDOMELANIA. 
245 
Bibliography, ^c. — Very little of a satisfactory nature can be made out 
with regard to these quondam “ Bulimas ” of the Yorkshire Beds. It seems 
reasonable to regard the Jurassic “ Eulimas ” as constituting a group of small 
Pseudomelanise. The group is more characteristic of the Great Oolite. 
When we come to deal with the so-called “ Eulima ” laovigata of the Scar- 
borough Limestone, the difficulty is further increased by the divergence between 
the authors’ description and their figure. According to the text the shell is very 
subulate, the length of the whorls being nearly equal to their transverse diameter. 
But the figure shows a shell with very short whorls, whose breadth is nearly 
twice their height. On the whole the figure is more reliable than the text, and 
more in accordance with the few specimens available. The following description is 
based upon two specimens from the Scarborough Limestone, one of which is said 
to be the type. 
Description : 
Spiral angle ..... 22°. 
Height of whorl to width (mean) . . . 1 : 1*8. 
Length ..... 14 — 15 mm. 
Shell conical-elongate, scarcely turrited. Whorls 10 — 12, narrow, smooth, 
yet showing fine spiral and axial lines where well-preserved, convex. Sutures 
distinct, but without canaliculation. 
Body-whorl rather short, base rounded and smooth. Aperture subovate and 
slightly expanded anteriorly. 
Relations and Distribution. — Since the “subulate” character of this species 
cannot be maintained, it is not very easy to say in what respect it differs from 
“ Eulima ” communis, Morris and Lycett. Rare in the Scarborough Limestone. 
A single specimen from the Dogger presents somewhat similar features. 
183. PsEUDOMELANiA AsTONENSis, sp. nov. Plate XVIII, figs. S a,Sb. 
Description : 
Spiral angle ..... 18°. 
Height of whorl to width . . . 1 : 1’45. 
Length (full) ..... 20 — 25 mm. 
Shell conical-elongate, scarcely turrited, smooth, spiral angle rather obtuse 
towards the apex. Number of whorls about sixteen, but often less. The whorls 
are extremely flat, and fit up close to the suture, so that there is no sulcus. The 
width of a whorl is equal to its height plus the height of the preceding one ; 
