156 CRETACEOUS LAMELLIBRANCHIA. 
Pecren (Camprongcres) Corraupinus, @’Orbigny, 1847. Plate XXIX, figs, 1, 2 a, b, 
3 tt, b. 
1845. Prcren crrcunaRris, H. Forbes. Quart. Journ. Geol. Soc., vol. i, p. 249 
(non Goldfuss). 
1847. —  Corranpinus, A. d@’Orbigny. Pal. Franc. Terr. Crét., vol. in, 
p- 590, pl. eceexxxi, figs. 7—11. 
1850. ~- — — Prodr. de Pal., vol. 11, p. 85. 
1855. —_— — G. Cotteaw. Moll. Foss. de ’Yonne, p. 115. 
1861. — — P. de Loriol. Anim. Invert. Foss. Mt. Salve, 
p. 108, pl. xii, fig. 3. 
1868. — — F. J. Piclet. Mélanges Paldont., pt. 4, p. 261, pl. x1, 
figs. 6, 7. 
— -- — EF. Hichwald. ethea Rossica, vol. 11, p. 451. 
1870 — — F. J. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Matér, Pal. Suisse, ser. 5), 
pp. 197, 212, pl. elxvii, fig. 3. 
? 1871. — = W. A. Ooster. Protozoe Helvetica, vol. 11, pp. 105, 
125, 141. 
~- — (SyneycLtonema) Corrauprnus, F’. Stoliczka. Palseont. Indica, Cret. 
Fauna 8. India, vol. i, p. 428. 
1900. a Corraupinus, G. Miller. Verstein. d. Jura u. d. Kreide. In W. 
Bornhardt, Zar Oberflachen u. Geol. 
Deutsch - Afrikas (Deutsch - Ost- 
Afrika, vol. vir), p. 551. 
Non 1895. —_ _ G. Maas. Zeitschr. d. deutsch. geol. Gesellsch., 
vol. xlvii, p. 269. 
Description—Shell ovate, rather higher than long, inequilateral; antero-dorsal 
margin slightly concave, and longer than the postero-dorsal, which is slightly 
convex. Convexity of valves.small. Ears very unequal. 
Right valve shehtly convex ; surface almost smooth, ornamented with numerous 
fine, regular, concentric grooves, which become more closely placed in passing 
from the umbo to the margin of the valve. The interspaces are flat and sometimes 
produced as slightly projecting lamine next the concentric grooves. Near the 
umbo the interspaces are crossed by very fine, close-set radial striae. Anterior ear 
large, produced, with a very deep byssal sinus, and a sulcus near the junction of 
the ear and valve; surface with many concentric narrow ridges. Posterior ear 
small, triangular, outer angle slightly obtuse, with concentric ornament. 
