HINNITES. 221 
1870. Hrnnrres Favrinvs, F. J. Pictet and G. Campiche. Foss. Terr. Crét. Ste. 
Croix (Matér. Pal. Suisse, ser. 5 
p. 231, pl. clxxviii. 
1871. — : I’. Stoliczka. Paleont. Indica, Cret. Fauna S. India, 
vol. ili, p. 450. 
1887. — L. Mallada. Sinops. Espec. Féss. Espana, vol. iii, Cret. 
infer. (Bolet. Mapa geol. Espana, 
vol. xiv), p. 131. 
Description.—Shell very large and thick, irregularly oval or subcireular, with 
rounded margins ; height sometimes equal to, but usually rather greater than the 
length. Hinge-line rather long; ears nearly equal. 
Right valve convex, attached by a more or less large portion in the region of 
Fic. 6.—Hinnites Favrinus, Pict. and Roux. Perna-bed, Atherfield. Museum of the Geological Society, 
No. 2022. Right valve. x }. 
the umbo; the unattached part has numerous broad, rounded, radial ribs of 
unequal size and sometimes bifurcated. Ribs with scale-like projections, and some- 
times showing fine radial grooves. A few concentric lamellz or depressions, and 
also numerous fine growth-lines, cross both ribs and grooves. 
Left valve nearly flat—sometimes slightly concave, sometimes slightly convex, 
with radial ribs and scales similar to those of the right valve, but the ribs rather 
9G 
