LIMA. 39 



Type.— In the collection of Mr. R. M. Biydone. 



Distribution. — Lower part of the zone of Micraster cor-anguinum of Seaford. 



Lima (Mantellum) Reichenjbachi, Geinitz, 1839. Plate VI, figs. 14 a, b, 15. 



1839. Lima Eeichenbachi, II. B. Geinitz. Char. d. Schicht. u. Petref. des sachs. 



Kreidegeb., pt. 1, p. 24, pi. viii, 

 fig. 4. 



1841. Eeichenbachii, F. A. Bomer. Die Verstein. d. nord-deutsck Kreide- 



geb., p. 57. 



1843. — Eeichenbachi, H. B. Geinitz. Die Versteiu. von Kieslingswalda, 



p. 23, pi. v, fig. 9. 



1846. — — A. E. Reuss. Die Verstem. der bolim. Kreidei'ormat., 



pt. 2, p. 34. 



1847. — Eeichenbachii, A. d'Orbigny. Pal. Fran?. Terr. Cret., vol. iii, p. 544, 



pi. ccccxviii, figs. 1 — 4. 

 1850. — Eeichenbachi, H. B. Geinitz. Das Quadersandst. oder Kreidegeb. 



in Deutschland, p. 190. 

 — Eeichenbachii, A. d'Orbigny. Prodr. de Pal., vol. ii, p. 166. 

 1855. G. Gotteau. Moll. Foss. de l'Yonne, p. 101. 



1867. — — E. Giu'ranger. Album Paleont. de la Sarthe, p. 19, 



pi. xxiv, fig. 5. 

 1869. — Eeichenbachii, F. J. Bidet and G. Gampiehe. Foss. Terr. Cret. Ste. 



Croix (Mater. Pal. Suisse, 

 ser. 5), p. 168. 

 1872. — — H. B. Geinitz. Das Elbthalgeb. in Sachsen (Pal- 



eeontograpliica, vol. xx, pt. 1), 

 p. 203, pi. xliii, figs. 1, 2. 

 1876. — Eeichenbachi, H. Deiclce. Tourtia v. Mulheim a. d. Euhr, p. 27. 

 1882. — Eeichenbachii, P. de Loriot. Gault de Cosne, p. 101, pi. xiii, fig. 5. 



Description. — Shell convex, oblong, oblique, rounded ventrally; antero-dorsal 

 margin long, nearly straight and almost parallel with the opposite margin. Height 

 considerably greater than length. Anterior area large, smooth, not depressed. 

 Ears rather small, the anterior somewhat larger than the posterior. 



Shell ornamented with from seven to ten very strong ribs, which have rounded 

 summits and are separated by rounded grooves of about the same width as the 

 ribs. Small and narrow radial ribs are present on both ribs and grooves. 



Measurements : 



(i) (2) (3) 



Length 29 . 25 . 21 mm. 



Height 35 . 34 . 27 „ 



Thickness . 19 . 16 . — „ 



(1 — 3) Cenomauiau, Wilmington. 



