182 CRETACEOUS LAMELLIBRANCHIA. 
1852. Prcten aptrensis, Ff. J. Pictet and W. Rouz. Moll. Foss. Gres verts de 
Genéve, p. 511, pl. xvi, fig. 3. 
1854. — INTERSTRIATUS, J. Morris. Cat. Brit. Foss., ed. 2, p. 176. 
? 1861. — Rosrinatpinus, P. de Loriol. Anim. Invert. Foss. Mt. Saléve, 
p: LOM ppl isan fics. Oh 0: 
— = Barrerti, H. G. Seeley. Ann. Mag. Nat. Hist., ser. 3, vol. vii, 
p- 118, pl. vi, fig. 1. 
? 1869. — LOBINALDINUS, P. de Loriol and V. Gilliéron. Urgon. Inf. de 
Landeron (Mém. Soc. helvét. Sei. 
nat., vol. xxiii), p. 22. 
1870. — —— F. J. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Matcr. Pal. Suisse, ser. 5), 
p. 188, pl. elxx, figs 1—5. 
1877. —  apriensis, A. J. Jukes-Browne. Quart. Journ. Geol. Soc., vol. xxxiu, 
p. 500. 
— = Barrer, Jukes-Browne. Ibid., p. 500. 
? 1883. — Dvremeret, W. Keeping. Foss., etc., Neoc. Upware and Brickhill, 
p. 105. 
1884. —  Roptnaupinus, 0. Weerth. Die Fauna des Neocom. im Teutoburg. 
Walde (Palaeont. Abhandl., vol. ii), 
p. 53. 
1895. <= — G. Maas. Zeitschr. d. deutsch. geol. Gesellsci., 
vol. xlvii, p. 269. 
1896. = — A. Wollemann. Ibid., vol. xlviii, p. 840. 
— — GALLIENNEI, PAssyt, et SUBINTERSTRIATUS, A.J. Jukes-Browne and 
W. Hill. Quart. Journ. Geol. 
Soe., vol. lu, p. 150. 
1900. —  Rosinaxpinus, A. Wollemann. Die Biv. u. Gastrop. d. deutsch. u. 
hollind, Neocoms (Abhandl. d. 
k. preussisch. geol. Land., N. F., 
pt. 31), p. 47. 
r 1900. — cf. Roprnanpinus, G. Miller. Ji W. Bornhardt, Zur Oberflachen 
u. Geol. Deutsch-Afrikas (Deutsch - 
Ost-Afrika, vol. vii), p. 551. 
Description—Shell ovoid, pointed dorsally, higher than long, shghtly imequi- 
lateral, of moderate convexity. Apical angle from 80° to 85°. Ears rather large, 
unequal. 
Right valve ornamented with numerous narrow, slightly raised ribs, which are 
sometimes wavy, and are separated by flattened spaces, often of greater width than 
the ribs. The ribs bear numerous small, scaly spines, which are placed transversely 
and are generally close together, but sometimes more widely and regularly sepa- 
rated. Spaces between the ribs covered by numerous striz, which in the middle 
of the valye are more or less parallel with the ribs, but become more and more 
oblique in passing towards the anterior and posterior borders. Anterior ear large, 
with a large sinus, well-marked growth-lines, and fait radial ribs. Posterior ear 
