NUCULANA. 5 
is in the Woodwardian Museum, and the original of fig. 33 in Mr. Meyer’s 
Collection; the originals of figs. 31 and 54 are missing. 
Specimens from the Atherfield Clay of Hythe and Atherfield, which Forbes 
states were identified by d’Orbigny, are in the museum of the Geological Society 
of London (Nos. 2107, 2115). 
Distribution.—Atherfield Clay of Atherfield, Sevenoaks, and Hythe ; Perna bed 
of Hast Shalford; Lower Greensand near Devizes; Speeton Clay (C 3) of Speeton. 
Nucunana Seeteyi (Gardner), 1884, Plate I, figs. 15a, b, 16a, b, 174, b. 
1884. Lrepa Seeveyi, J. 8S. Gardner. Quart. Journ. Geol. Soe., vol. xl, p. 137, 
pl. v, figs. 17—19 (non 20). 
Description.—Shell oval, nearly equilateral, high and rounded at the 
extremities; moderately convex; somewhat flattened. Ventral margin gently 
curved. Umbones rather small, almost median. Surface smooth. 
Measurements : 
(1) (2) 
Length 7 10 mm. 
Height 5 lets 
Thickness . : : 5 2 cds 
Affinities. —N. Seeleyi is distinguished from N. Vibrayeana (d’Orbigny) by the 
higher and more evenly rounded extremities, by the larger apical angle, by the 
gentler curve of the ventral margin, and by the central part of the valves being 
somewhat flatter. 
Types.—In the Woodwardian Museum (figs. 17,18 of Gardner) and the British 
Museum (figs. 19, 20), 
Distribution—Speeton Beds (C 3 and C 9) of Speeton. 
2. Gault and Upper Greensand Species. 
Nucunana souea (d’Orbigny), 1844. Plate I, figs. 18—24. 
1844. Nucuna sovea, A. d’Orbigny. Pal. Franc. Terr. Crét., vol. ii, p. 170, 
pl. eceiv, figs. 4—6. 
1850. Lepa sores, A. d’Orbigny. Prodr. de Pal., vol. ii, p. 186. 
1866. — ~-— KF. J. Pictet and G. Campiche. Foss. Terr. Crét. de Ste. 
Croix (Matér. Pal. Suisse, ser. 4), 
pt. 3, p. 401. 
1884. — — J.S8. Gardner. Quart. Journ. Geol. Soc., vol. xl. p. 189, 
pl. iii, fig. 30. 
