OOLITIC BIVALVES. 
05 
LIMA GIGANTEA.— Sow ? 
Mineral Conch., plate 77. 
I cannot separate one fragment from the Niti Pass, from 
Sowefby's well-known Lias fossil. 
LIMA ACUTA .—Stoppani ? 
Plate 22, fig. 14. 
Paloeontologic Lombardie, 3rd ser., plate 13, fig. 9; or compare with 
Lima punctata, Sow. Min. Conch., plate 113, figs. 1, 2. 
I think this agrees best with StoppanFs figure; but unless 
the radiating lines are rather too strong, it agrees as well with 
the common Marlstone fossil, L. punctata . Mr. Etheridge 
would identify it with this latter species. 
INOCERAMUS HOOKERI—A T . Sp. 
Plate 23, fig. 1; and Yar. crenatulinus* %• 2. 
A fine shell, nearly three inches long, and more resembling 
I. conceniricus of the Gault, or Jnoc. lingua , Goldfuss, from 
the Greensand, than any other species. 
We have two forms,—possibly two species. Fig. 2 
appears to be remarkably narrower than fig. 1, and to have a 
different curvature of the ribs. I have, therefore, distinguish¬ 
ed it, but at present only as a variety. 
The broader form, fig. 1, has a small posterior ear on 
which -the lines of growth are sharp, but not ridgy. The sur¬ 
face is occupied by broad prominent ribs, with equally broad 
furrows between them, and the ribs are of the same thickness 
and strength from side to side of the shell. The lines of 
growth do not coincide with the ribs. 
The narrower form, fig. 2, has a pointed beak, a short 
oblique hinge-line, a less regularly convex surface abruptly 
and steeply bent down along the anterior side, on which side 
the concentric ridges are ^lost—lines of growth only being 
present at intervals. 
