458 GASTEROPODA OF THE INFERIOR OOLITE. 
Family—CALY PTRAID AS. 
* Shell linpet-like, with the apex more or less spiral; interior stinple or divided 
by a shelly process, variously shaped, to which the adductor muscles are attached.’— 
8. P. Woopwarp. 
Genus—Carutus, Montfort, 1810. 
** Shell conical, apex posterior, spirally recurved: aperture rounded ; muscular 
unpression horseshoe-shaped.”—S. P. Woopwarp. 
Since Capulus dates from Palzeozoic times, we need not be surprised at finding 
it in beds of Jurassic age. The two following species are somewhat more oval 
than is usual in this genus. 
A402. Carutus Rrucosus, Sowerby, 1816. Plate XLII, figs. 1 a, 1b, 2a, 2b. 
1816. ParEenna ruGosa, Sowerby. Min. Conch., pl. exxxix, fig. 6. 
1851. -- — — Morris and Lycett, Gt. Ool. Moll., pt. 1, 
p- 89, pl. xii, figs. 1 a—le (non fig. 1/). 
1885. Parrrta (Hercion) rucosa, Sowerby. Cossmann, Btage Bathonien, 
p- 349, pl. xu, figs. 1—5. 
1894. Capunus ruGcosus, Sowerby. Bohm, Neues Jahrbuch, 1894, Bd. i, p. 201. 
Syn. or var. Parenta Tessonir1, Deslongehamps. Mém. Soc. Linn. Norm., vol. vii, 
p. 113, pl. vu, figs. 3 and 4. 
Bibliography, S§c.—Patella rugosa was originally described by Sowerby from 
the Great Oolite of Minchinhampton, where it is extremely abundant, but for the 
most part much worn, like many of the Minchinhampton shells. Hence the slight 
spiral apex is in no case preserved in the Minchinhampton fossils. The species is 
very much rarer in the Inferior Oolite, yet specimens from the Lincolnshire 
Limestone, such as the one figured, do occasionally exhibit the capuliform apex 
Such specimens had been in my Collection for some years, when Herr Bohm 
(op. cit.) was able to demonstrate that P. rugosa is in reality a species of Capulus. 
Description.—The figured specimen has the following dimensions : 
Length ; : : . 44 mm. 
Width . 34mm. 
Height : : : . 12mm. 
