182 CRETACEOUS LAMELLIBRANCHIA. 



1852. Pecten aptiensis, F. J. Plctet and W. Uoux. Moll. Foss. Grcs verts de 



Geneve, p. 511, pi. xlvi, fig. 3. 

 1854. — • INTEESTEIATUS, /. Movris. Cat. Brit. Foss., ed. 2, p. 170. 

 18G1. — EoBiNALDiNUs, P. de Loriol. Anim. Invert. Foss. Mt. Saleve, 



p. 101, pi. xii, figs. 9, 10. 

 — — Bareetti, H. G. SeeJey. Ann. Mag. Nat. Hist., ser. 3, vol. vii, 



p. 118, pi. vi, fig. 1. 



1869. — RoBiNALDiNUs, P. de Loriol and V. GiUv'ron. Urgon. Inf. de 



Landerou (Mem. Soc. lielvet. Sci. 

 uat., vol. xxiii), \). 22. 



1870. — — F.J. Pldet and G. Campiche. Foss. Terr. Crct. 



Ste. Croix (Matt'r. Pal. Suisse, ser. 5), 

 p. 188, pi. clxx, figs 1-5. 

 1877. — APTIENSIS, A. J. JuJces-Browne. Quart. Journ. Geol. Soc, vol. xxxiii, 



p. 500. 

 y — — Baeeetti, Juices-Browne. Ibid., ]>. 500. 



'? 1883. — DuTEMPLEi, W. Keeiring. Foss., etc., Neoc. Upware and Brickliill, 



p. 105. 

 188-4. — EoBiNALDiNUs, 0. Weerth. Die Fauna des Neoconi. ini Teutoburg. 



Walde (Palacont. Abhandl., vol. ii), 

 p. 53. 



1895. — — G. Maas. Zeitsclir. d. deutscli. geol. Gescllseli., 



vol. xlvii, 2). 269. 



1896. — — A. WoUemann. Ibid., vol. xlviii, p. 840. 



— — Galliennei, Passyx, et subinterstkiatus, A. J. Jukes-Broivne and 



W. Hill. Quart. Journ. Geol. 

 Soc, vol. lii, p. 150. 

 1900. — EOBINALDINUS,^. IVollemann. Die Biv. u. Gastrop. d. deutsch. u. 



lioUiind. Neocoms (Abhandl. d. 

 k. preussiscb. geol. Land., N. F., 

 pt. 31), p. 47. 

 p 1900. — cf. EOBINALDINUS, G. Milller. In W. Bornbardt, Zur Oberflacben 



u. Geol. Deutsch-Afrikas (Deutscli- 

 Ost-Afrika, vol. vii), p. 551. 



BcscriiMon. — Shell ovoid, pointed dorsally, liiglier tliaii long, slightly inequi- 

 lateral, of moderate convexity. Ai)ical angle from 80" to 85°. Ears rather large, 

 unequal. 



Right valve ornamented Avith 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 striae, which in the middle 

 of the valve are more or less parallel with the ribs, but become more and more 

 oblicjue in passing towards the anterior and posterior borders. Anterior ear large, 

 with a large sinus, well-marked growth-lines, and faint radial ribs. Posterior ear 



