LIMA. 25 



Types. — D'Orbigny's specimens came from the Lower Senonian of Dordogne, 

 Charente-Inferieure, Cambrai, and Aube. 



Distribution. — Zone of Belemnitella mucronata of Norwich. 



Sub-genus — Acesta, E. and A. Adams, 1858. 

 (' Genera of Recent Mollusca,' vol. ii, p. 558.) 

 Lima (Acesta) longa, Homer, 1841. Plate V, figs. 8a,b, 9—11, 12 a, b. 



1836. Lima elongata, F. A. Burner. Die Verstein. d. nord-deutsch. Oolith.-geb., 



p. 79, pi. xiii, fig. 11 (non elongata, 

 Sowerby). 



1841. — longa, Burner. Die Verstein. d. nord-deutsch. Kreidegeb., p. 57. 



1847. — — A. d'Orbigny. Pal. Franc. Terr. Cret., vol. iii, p. 529, pi. 



ccccxiv, figs. 13 — 16. 



1850. — — — Prodr. de Pal., vol. ii, p. 81. 



1865. — — H. Coquand. Mon. Aptien de l'Espagne, p. 149. 



1868. — — P. de Loriol. Valangien d'Arzier. (Mater. Pal. Suisse, ser. 4), 



p. 41, pi. iii, fig. 11. 



1869. — —F.J. Fictet and G. Gamjnche. Foss. Terr. Cret. Ste. Croix 



(Mater. Pal. Suisse, ser. 5), p. 128, 

 pi. clxi, figs. 6, 7. 

 1871. — — W. A. Ooster. Protozoe Helvetica, vol. ii, pp. 104, 123. 



1877. — — G. Bohm. Zeitsclir. d. deutsch. geol. Gesellsch., vol. xxix, 



p. 235. 



1883. — — W. Keeping. Foss., etc., Neoc. TJpware and Brickliill, p. 112, 



pi. v, fig. 6. 



1884. — n. sp., 0. Weerth. Die Fauna des Neocom. im Teutoburg. Walde 



(Palseont. Abhandl., vol. ii), p. 51. 

 ? 1895. — (Plagiostoma) cf. Eobinaldina, F. Vogel. Holland. Kreide, p. 56. 

 1896. — longa, A. Wollemann. Zeitsclir. der deutsch. geol. Gesellsch., 



vol. xlviii, p. 836. 

 1900. — — Die Biv. u. Gastrop. d. deutsch. u. holliind. 



Neocoms (Abhandl. d. k. preussisch. geol. 

 Land., N. F., pt. 31), p. 27. 



Description. — Shell compressed, sub-triangular, rounded, considerably higher 

 than long, of small obliquity. Posterior and ventral margins convex; anterior 

 margin straight. Umbones pointed, close together. Apical angle small — about 70°. 

 Posterior ear large, not separated from the rest of the valve by a depression, 

 ornamented with radial ribs. Anterior ear smaller, much higher than lone:. 



