CLEMENTIA. 191 



Ricordeana is less elongate and its postero-dorsal margin is more convex and slopes 

 more rapidly than in Venus sub-Brongniartiana d'Orbigny. 1 



Remarks.- — This is probably the species which has been recorded by some 

 authors from the Lower Greensand as Venus ovalis and Astarte substriata, Leymerie. 

 The proportions of length and height vary considerably in different specimens. 



Distribution. — Lower Greensand (Perna-bed) of Atherfield. Atherfield Beds 

 of East Shalford, Eedhill, and Peasmarsh. Hythe Beds of Hythe, Lympne, and 

 Pnlborongh. • 



Olementia (Flaventta) ovalts (Sowerby), 1827. Plate XXIX, figs. 19 — 20. 



1827. Venus ovai.is, J. de C. Sowerby. Min. Conch., vol. vi. p. 129, pi. dlxvii, 



fig. 1 (not fig. 2). 

 1850. A. d'Orbigny. Prodr. de Pal., vol. ii, p. 159. 



1854. J~. Morris. Cat, Brit, Foss., ed. 2, p. 231 (not from the 



localities given). 

 1870. F. StoliczJca. Palaeont. Indica, Cret, Fauna S. India, vol. 



iii, p. 160. 



Non 1840. A. Goldfuss. Petref. Germ., vol. ii, p. 247, pi. cli, fig. 5 



{Venus subovalis, d'Orbigny, 1850). 

 1846. A. E. Beuss. Die Verstein. der bohm. Kreideformat., pt. 2, 



p. 21, pi. xxxiv, fig. 22. 



— 1847. — —J. Miiller. Petref. der Aachen. Kreidef., pt, 1, p. 24. 



— 1870. — II. Credner. Zeitschr. d. deutsch. geol. Gresellsch., vol. xx, 



p. 191. 

 1884. Cytherea ovalis, E. Holzapfel. Ibid., vol. xxxvi, p. 464, pi. vii, figs. 2—4. 



— 1888. — G. Miiller. Jahi-b. d. k. preussisch. geol. Landesanst. fur 



1887, p. 427. 

 _ 1889. — — E. Holzapfel. Die Mollusk. Aachen. Ereide (Palseon- 



tographica, vol. xxxv), p. 169, pi. xiii, 

 figs. 11—15. 

 Venus — A. Fritsch. Stud, im Cebiete der bohm. Kreideformat., 



iv, Teplitz. Schicht., p. 80, fig. 69. 



— 1898. Cytherea — G. Miiller. Mollusk. d. Untersen. v. Braunschweig u. 



Ilsede, p. 66. pi. ix, fig. 15. 



— 1901. — F.Sturm. Jahrb. d. k. preussisch. geol. Landesanst. fiir 



1900, vol. xxi, p. 83. 



Description.— Shell elongate-oval, of moderate convexity, considerably inequi- 

 lateral. Antero-dorsal margin rather long, concave. Anterior margin rounded, 



1 Leymerie, 'Mem. Soc. geol. de France,' ser. 2, vol. v (1842), pp. 5, 25, pi. v, fig. 7; d'Orbigny, 

 ' Pal. Fran?. Terr. Cret.,' vol. iii (1845), p. 432, pi. ccclxxxii, figs. 3 — 6; Pictet and Campiche, 'Terr. 

 Cret, Ste. Croix' (1865), p. 168, pi. cxi, fig. 1. 



