64 EOCENE MOLLUSCA. 
2. Mopioia Desnayesut, J. Sowerby. ‘Tab. XIII, fig. 14, a, 6. 
Lirnopomus Drsnayesi. J. Sow. in Dixon’s Geol. of Sussex, pp. 94, 171. t. 2, fig. 28. 
— — Morris. Catal. Brit. Foss., p. 207, 1854. 
MopioLa LITHOPHAGA. Desh. Coq. Foss. des Env. de Par., t. i. p. 267, t. 38, figs. 10 —12. 
— _ Pictet. Traite de Palzont., vol. iii, p. 584, pl. 81, fig. 9. 
Myritus tirHopHacus. Desh, Trait. Element, t. 37, figs. 5, 6. 
LyrHOpOMUs sUBLITHOPHAGUS. D’Orb, Prod. Paleont., p. 391, No. 1083. 
= = Bellardi. Catal. Ragion. dei. foss. Numm. d’Egitto, p. 26, 
No. 62, 1854. 
MopioLa Desuayesit. Desh. An. sans Vert. du Bassin de Par., t. ii, p. 18, 1860. 
Spec. Char. M.“ testa elongatd cylindraced, recta ; antice tumidiore ; eatremitatibus 
obtusis ; striislongitudinalibus postice brevibus ; striis transversis trregularibus, decussatis.” 
Length, \ inch. 
Localities. Bracklesham (Dixon). 
France, Parnes, Chaumont (Desh.), Egypt, Sinde (Bel/ardi). 
The figure above referred to is a copy of the one in Mr. Dixon’s work. The specimen 
cannot now be found. 
The Paris basin shell, when first described, was doubtfully considered to be a variety 
of the existing species, under which name it was then published. M. Deshayes, in his 
‘Hist. des An. sans Vert. du Bassin de Paris,’ p. 18, has adopted the above specific 
one, which was given to it by Mr. Jas. Sowerby, who considered it sufficiently different to 
be entitled to a distinct position, and M. Deshayes is now of the same opinion. I regret 
not having been able to see the British fossil. 
3. Moproua pimiprata, S. Wood. ‘Tab. XIII, fig. 5. 
Spec. Char. M. testdé tenui, depressd, subcylindraced, elongata ; pedi-regione brevi, 
rotundatd, valdé inequilaterali ; dimidiatim radiata, umbonibus depressis ; margine ventral: 
rectiusculo. 
Shell thin, depressed, nearly cylindrical, elongate; pedal region short, rounded; one 
half of the shell striated or rayed, the other smooth or naked ; ventral margin nearly 
straight. 
Length, iths of an inch. 
Locality. Wighcliff, Barton (Zdwards). 
I have seen only a single specimen of this elegant species, but it is well marked ; it 
approaches the cylindrical and stone-eating shells called Lzthodomus. The strive cut 
the shell diagonally into two nearly equal parts, covering the whole of the siphonal region 
and extending from the umbo to the extremity of the margin, the other half of the shell is 
free from these markings, with the exception of the extreme margin on the pedal side, 
which has a few rays or ridges. 
