40 CRETACEOUS LAMELLIBRAXCHIA. 



liciiKirks. — This species is easily distiuguislied b_y the very strong radial ribs. 

 The English sjiecimens, which at present are known from three localities only, are 

 not well-preserved, so that the details of the ornamentation cannot be seen clearly. 



The occm'rence of L. lieichenbacld in England (from Wilmington) was first 

 noted by Mr. Jukes-Browne in 1898. The only specimens which I have seen are 

 now in the Museum of Practical Geology and the Sedgwick Museum. 



Types. — From the Lower Planer (Cenomanian) of Plauen near Dresden. 



Distrihutioh. — Upper Greensand (zone of Peden aspcv) of Warminster. 

 Chloritic Marl of Chard. Cenomanian Sandstone of Wilmington. 



Lima (]\L\ntellum), sp. Plate VI, fig. IG a, h. 



BeiiLdiii-". — A small specimen in the Museum of Practical Geology (Xo. 7896) 

 is similar in form and in the general character of its ornamentation to L. canta- 

 hr'ujiensiti (see p. 37), but the main ribs are not so strongly developed, the 

 interspaces are flatter, and the intermediate ribs are more prominent. It differs 

 from L. intermedia in its more distinctly oblong form and in the occurrence of 

 well-developed intermediate ribs. 



This specimen resembles closely the lowest of the three figures referred io Lima 

 elegans by Gucranger.^ 



Distribution. — Chloritic Marl of Chardstock. 



Sab-genus — Ctenoides, II. (ind A. Adams, 1858 (ex Klein, 1753). 



('Genera of Keceut Mollubca,' vol. ii, p. 557). 



LiM.\ (('TE\(m.|.>) \\\v\, d'Orbiijinj, 1847. Plate VI, figs. Ma-r. Plate VIT, fig. 1. 



Text-fig. 6. 



1847. Lima hai-a, ^-1. d'Orhujny. Pal. FraD9. Terr. Crt't.,vol. iii, p. 54(3, pi. ccccxix, 



figs. 1 — 4. 

 1850. — — A. d'OrhiijHij. Proilr. cle Pal., vol. ii, p. 106. 

 — — — H. B. Gdnitz. Das Quadersaudst. oder Kreidegeb. iu Deulscli- 



laud, p. 188. 

 1855. — — G.Cotteau. Moll. Foss. de I'Youne, p. lOl. 

 1867. — — E. Guerarujer. Album Palcont. de la Sartlie. p. I'.i, pi. xxiv, 



figs. 16, 17. 



' Album Paluont. de la Sarthe ' (1867), p. 18, pi. xxiv, fig. 1. 



