222 CRETACEOUS LAMELLIBRANCHIA. 



Pamu'Ka .spilsiukxsis, sp. iiov. Plate XXXVIII, fig. 2a,h. 



Descrijjtion. — Shell elongate-oval, convex, not very ineciuilateral. Posterioi" 

 part more compressed and not so high as the median and anterior parts. Anterior 

 margin rounded; ventral margin slightly cnrved, not ([uite parallel to the long 

 dorsal margin. Umbones broad, incnived, at about six-fifteenths of the entire 

 length from the anterior end. Pallial sinus large, deep, and rounded. Surface of 

 shell nearly smooth. 



licnuiJ'kti. — Only a few internal casts with small portions of the shell preserved 

 have been obtained, but they seem to differ considerably from other species and 

 are provisionally referred to the' genus I'aiinpea. 



Distribiifioii. — Spilsby Sandstone (zone of Belemnites lutrralb) of Donnington. 



Paxopea GUKKiTis {Brunyidaii), 1822. Plate XXXV, figs. 9—U; Plate XXXVI, 



figs. 1—8. 



1822. LuTRARiA GVRGniii, A. Briiiniiiiart, in Ciivier. Ossemeus Foss., vol. ii.pt. 2, 



pp. 333, 61.5, pi. ix, fig. 15. 



1823. Mya plicata, J. de C. Sowerhy. Min. Conch., vol. v, p. 20, pi. ccccxix.fig. 3. 

 183-5. Panop.ea plicata, Soirerbi/. Ibid., vol. vi, Systeiuat. Index, p. 2-11. 



1841. — — F. A. Rijmev. Die Verstein. d. nord - deutscli. 



Kreidegeb., p. 75, pi. ix, fig. 25. 



1842. Phiiladomya neocomiensis, A. Leymerie. Mcni. Soc. gt'ol. de France, ser. 2, 



vol. V, p. 3, pi. iii, fig. 4. 



— — Prevosti, Beshayesf in Leymeri-;. Ibid., p. 3, pi. ii, fig. 7. 

 1845. Panop.ba neocomiensis, A. d'Oiiiiijny. Pal. Fraiic. Terr. Cret., vol. iii, 



ji. 329, pi. cccliii, figs. 3—8. 



— — Pkevosti, d'Orhnjny. Ibid., p. 334, pi. ccclvi, figs. 3, 4. 



— NEOCOMIENSIS, £. jFor6e». Quart. Joui ii. Geol. Soc, vol. i, p. 288. 



— — PLICATA, Forbes. Ibid., p. 238. 



— Mtopsis NEOCOMIENSIS, L. ^(/n««('2. Jltudes crlt. Moll. Foss., M\es, p. 257, 



pi. xxxi, figs. 5 — 10. 



— — UNioiDES, Aijassiz. Ibid., p. 258, pi. xxxi. figs. 11, 12. 



1850. Panop.ea NEOCOMIENSIS, A. d'Orhiijny. Prodi', de Pal., vol. ii, pp. 73, 117. 



— — Prevo.stii, d'Oi-hiijiiy. Ibid., pp. 105, 117. 



1852. — plicata, F. J. Pirti't and W. Koux. Moll. Foss. Grcs verts de 



Geneve, p. 399, pi. xxviii, fig. 2. 



— — Khodani, Fictt'l and Muiix. Ibid., p. 400, pi. xxviii, tig. 3. 



1854. MvAciTES NEOCOMIENSIS, /. Morris. Cat. Brit. Foss., ed. 2, p. 213. 



1855. Panop.«a — F. J. Pictet and E. Renevler. Foss. Terr. Aptieu 



(Mati'r. Pal. Suisse, ser. 1), pp. 56, 175, pi. vi, 

 figs. 2, 3. 



— — plicata, Ficfet and Renevier. Ibid., p. .')7, pi. vi. figs. 4, 5. 



