210 



CRETACEOUS LAMELLIBRANCHIA. 



of such ribs in only a few specimens. A typical form is figured by Bayle; it 

 agrees perfectly with specimens from the Cenomanian of Rouen and Orbiquet 

 which have been sent me by M. Fortin, and with others from the Cenomanian of 

 Le Havre, sent by M. A. de Grossouvre. 



Remarks. — Morris referred the specimens from the Upper Greensand, which 

 Sowerby figured as P. quinqueco status (figs. (3 — 8), to this species, but they are 

 clearly distinguishable by the presence of six main ribs, and by the concentric 

 ornamentation. 



Types. — Lamarck's types came from the Cenomanian of Le Mans, and from 

 near Angers. Goldfuss' specimens came from the Quader-sandstone near Dresden, 

 and the Greensand of Regensburg. 



Distribution. — Upper Greensand (Chert Beds, zone of Pecten asper) of Haldon, 

 of Worbarrow, and Warminster. Chloritic Marl of Maiden Bradley. 



Pecten (Neithea) qttadeicostatus, Sowerby, 1814. Plate XL, figs. 6, 7. Text- 



3—5. 



1806. (Figure without name), J. Sowerby. British Mineralogy, vol. ii, p. 159, 



pi. clxxxiii. 

 1814. Pecten quadricostata, Sowerby. Min. Conch., vol. i, p. 122, pi. lvi, 



figs. 1, 2. 

 1833. — quadricostatus, A. Goldfuss. Petref. Germ., vol. ii, p. 54 



(partim), pi. xcii, fig. 7. 

 1837. — quadricostata, H. G. Bronn. Lothaea Geogn , p. 680, pi. xxx, 



fig. 16. 

 1839. — quadricortatus, H. B. Geinifz. Char. d. Schicht. u. Petref. des 



sachs. Kreidegeb., pt. 1, p. 22. 

 1841. — F. A. Bi'nner. Verstein. des nord-deutsch. 



Kreidegeb., p. 54. 

 1843. H. B. Geiuitz. Die Verstein. von Kieslingswalda, 



p. 16, pi. iii, figs. 14, 15. 

 1846. Geinitz. Grundriss der Verstein., p. 469. 



— versicostatxjs, A. E. Reiiss. Die Verstein. der bohm. Kreide- 



format., pt. 2, p. 31 (? partim). 

 1850. Janira Geinitzii, A. d'Orbigny. Prodr. de Pal., vol. ii, p. 197. 

 1850-51. Neithea quadricostatus, H. G. Bronn. Lethaea Geogn., ed. 3, vol. ii, 



pt. 5, p. 277, pi. xxx, fig. 16. 



1853. Janira Faucignyana, F. J. Pictet and W. Boux. Moll. Foss. Gres verts 



de Geneve, p. 505, pi. xlv, fig. 2. 



1854. Pecten quadricostatus, /. Morris. Cat. Brit. Foss., ed. 2, p. 177. 

 1863. A.Kunth. Zeitschr. d. deutsch. geol. Gesellsch., 



vol. xv, p. 725. 



