42 * rRETAf'EOTIH LAMETJ.IBIUNCHTA. 



Measurements : 



(I) (2) (3) 



Length . 66 . 43 . 30 nun. 



Height . 90 . 50 . 41 „ 



'o* 



(1 —3) Upper GreensanJ, Haldou. 



yijfhrifirs. — L. rapa is closely related to L. flivririrafa (p. 41) but the valves 

 are less flattened and the anterior part slopes gi'adually to the margin ; the outline 

 is more regularly ovate, and the anterior and posterior ribs are much narrower 

 than the others. L. rapa is usually considerably larger than L. divaricafa. 



Types. — From the Cenomanian of Coudrecieux and Le Mans. 



Bemarhs. — The presence of this species in English deposits appears to have 

 been recognised first by the late Mr. C. J. A. Meyer ; it was rocordod hy Mr. 

 Jukes-Browne in 189G. 



Dhinbufhm. — Upper Greensand of Haldon. Cenomanian (Meyer's Bed 10) of 

 Dunscombe. 



Lima (Ctenoider) tecta, Goldfuss, 188G. Plate VII, figs. 2, 3. 



1836. Lima tecta, A. Goldfuss. Petref. Germ., vol. ii, p. 91, pi. civ, fit;. 7. 



1837. — FEONDOSA, F. Bujardin. Mem. Soc. gt'ol. de France, vol. ii, pp. 216, 



227, pi. xvi, fig. 10. 

 1839. — LAMELLosA, H. B. Gehiitz. Char. d. Schiclit. u. Petref. des siiclis. 



Kreidegeb., pt. 1, p. 23. 

 1841. — TECTA, F. A. Bi'imer. Die Versteiu. d. nord-deutsch. Kreidegeb., p. 58. 

 1847. — — A. d'Orh'ujny. Pal. Fraii9. Terr. Cret., vol. iii, p. 547, pi. ccccxix, 



figs. 5—8. 

 1850. — — H. B. Gcinifz. Das Quadersaudst. oder Kreidegeli. in Poutscli- 



land, p. 188. 



— — — A. d'Orhigny. Prodr. de Pal., vol. ii, pp. 166, 247. 



— — — ?, A. AUh. Geogn.-pal. Beschreib. Umgcb. v. Lemlierg 



(Haidiuger's Naturwiss. Abhandl., vol. iii, 

 pt. 2), p. 243. 

 ? 1852. — — ?, iJ. Kner. Denkschr. d. k. Akad. Wisseuscli. Math.-nat. 



CI., vol. iii, p. 318, pi. xvii, fig. 7. 

 1867. — — E. Gueranger. Album Pak'out. de la Sartlie, p. 19, pi. xxiv, 



fig. 11. 

 1869. — — E. Favre. Moll. Foss. de la Craie de Lemborg, p. 135. 

 1869-70. - —F.J. Pidet and G. Campiche. Foss. Terr. Crct. St<?. Croix 



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

 pp. 168, 170, 173. 

 1871. Radula (Ctenoides) tecta, F. Stoliczka. Palocont. ludica, Cret. Fauna 



S. India, vol. iii, p. 420, 

 pi. XXX, fig. 12. 



