258 
DEVONIAN FAUNA. 
10. EgoMPHALUS ROTA, Saudberger. PI. XXV, figs. 6 — 8. 
1841. EuoMPHALus EADiATUs, Phillips (not Oolclfuss MS.). Pal. Foss., p. 138, 
pi. Ix, fig. 171*. 
1853. — BOTA, Sandherger. Verst. Ehein. Nassau, p. 212, pi. xxv, 
figs. 5, 5 a — d. 
1854. — EADiATUS ?, Morris. Cat. Brit. Foss., p. 248. 
1888. — — Etheridge. Foss. Brit., vol. i, Pal, p. 163. 
1889. — HOTA, Wkidborne. Geol. Mag., dec. 3, vol. vi, p. 30. 
Description. — Shell small, flat, discoidal, of numerous (five or six) volutions, 
elliptically coiled. Spire so much depressed below the plane of the exterior whorl 
as to be almost, if not quite, symmetrical with the base. Suture deep. Whorls 
rising convexly from the suture, shortly elliptic or almost circular in section, 
except where they are indented by the whorl within, but bearing upon the upper 
and lower elbows a sharp, raised, prominent, spiral keel or ridge, more confluent 
towards the back than towards the sides, so that the back of the whorls is 
almost flat. Surface, except on the keels, marked by multitudinous, close, fine, 
rounded, transverse threads, sloping slightly backwards from the suture to the 
keel. Mouth slightly expanded and much thickened round its margins. A varix 
sometimes crossing the whorl at about one-third of a volution behind the mouth. 
Size. — Phillips's original specimen measures 8 mm. in height by 23 mm. in 
width. Another specimen is 9 mm. in height by 30 mm. in width. 
Localities. — Wolborough ; Lummaton (?). From the former locality there are 
four specimens in Mr. Vicary's Collection, five in the Museum of Practical 
Geology, of which one is Phillips's figured specimen, and one in the Torquay 
Museum. In the Torquay Museum are three specimens which most probably 
come from Lummaton, and there is one from Barton in the British Museum. 
BemarJcs. — The nomenclature of this shell is rather intricate. In 1832 Gold- 
fuss^ catalogued without description a German shell under the name oi Euomphalus 
radiat'us. He, however, appears to have described it in manuscript, and from this 
description Phillips, in 1841, incorrectly identified the Devonshire specimens with 
Goldfuss's species.'' Hence, though Phillips's species was actually published before 
that of Goldfuss, it does not seem right that it should appropriate a name only 
given to it by mistake ; and therefore it must bear the name which, in 1853, 
Sandberger gave to other German shells which are undoubtedly identical with it. 
The only difference between the English specimens and Sandberger's figure 
1 1832, Goldfuss, in ' De la Eeche Handbook,' p. 532. 
2 1844, Goldfuss, ' Petref. Germ.,' vol. iii, p. 83, pi. clxxxix, fig. 14. 
