454 GASTEROPODA OF THE INFERIOR OOLITE. 
396. Rimua oLatarara, Sowerby, 1826. Plate XLI, figs. 15a, 15d. 
1826. Emanrarnuna crarHrata, Sowerby. Min. Conch., pl.dxix, fig. 1. 
1851. Rimuna craruHrara, Sowerby. Morris and Lycett, Gt. Ool. Moll., pt. i, p. 86, 
pl. viil, fig. 1. 
1854. —_ -— -- Morris, Cat., p. 276, from G. O. only. 
1885. — — — Cossmann, Etage Bathonien, p. 342, pl. vi, 
figs, 31—33. 
Bibliography, §¢.—Kssentially a Great Oolite species, the type being from 
Ancliff, rare at Minchinhampton ; stated by Cossmann to be tolerably abundant 
at Epernay. Quoted by Lycett from the Inferior Oolite, Leckhampton. I have 
not seen satisfactory specimens myself from that locality. On the other hand, the 
Lincolnshire Limestone, which contains so many Bathonian forms, has yielded 
quite a series of fossils at Stoke Lodge, which may fairly be ranked under 
R. clathrata, though somewhat more angular in outline than the Ancliff shells. 
Description (Inf. Ool. variety) : 
Length of base f ; . 6mm. 
Width approximate - 4°5 mm. 
Height | 5 mm. 
Shell capuliform with a perfectly oval base and curved apex, which projects 
considerably beyond the posterior margin. The convex dorsal area is somewhat 
flattened on each side of the very conspicuous midrib, whichis separated from the 
ribs of either flank by a considerable space. From eight to ten strong longitu- 
dinal ribs on each side ornament the surface, and these are strongly decussated by 
transverse ribs producing nodes at the points of intersection: subsidiary longi- 
tudinal ribs may also be noted. The midrib is thick, and the lower edge of the 
perforation at a considerable distance from the anterior margin. 
Relations and Distribution —The size, the somewhat rounded back, and 
especially the regularly nodose ornamentation, may serve to distinguish this from 
any other species of Riimula in the Inferior Oolite. My specimens are all from 
Stoke Lodge. 
397. RimMULA RUGOSA, sp. nov. Plate XLI, figs. 16a, 16 b. 
Description : 
Length | ; . 4mm. 
Width } approximate - : : . 2°59 mm. 
Height | | 2°75 mm. 
Shell small, conical, elevated; base oval, apex strongly curved posteriorly, 
sides compressed. The midrib and the two diverging lateral ribs on the anterior 
