HINNITES. 



221 



1870. Hinnites Favrinus, F. J. Pictet and 0. Ccmpiche. Foss. Terr. Cret. Ste. 



Croix (Mater. Pal. Suisse, ser. 5), 

 p. 281, pi. clxxviii. 



1871. — F. Stoliczka. Palseont. Indica, Cret. Fauna S. India, 



vol. iii, p. 430. 

 1887. — L. Mallada. Sinops. Espec. Foss. Espafia, vol. iii, Cret. 



infer. (Bolet. Mapa geol. Espafia, 

 vol. xiv), p. 131. 



Description. — Shell very large and thick, irregularly oval or subcircular, 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 



Fig. 6.— Hinnites Favrinus, Pict. and Roux. Perna-bed, A.therfield. Mnseui 

 No. 2022. Right valve. x J. 



i>f the Uwlo^ical Society, 



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 lamella? 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 



29 



