Janira laevigata Gabb, 1881
GABB, W. M. 1881. Descriptions of New Species of Fossils from the Pliocene Clay Beds between Limon and Moen, Costa Rica, together with Notes on previously known Species from there and elsewhere in the Caribbean Area. Journal of the Academy of Natural Sciences of Philadelphia [2nd Series], 8: 349-380. [p. 379, pl. 47, fig. 84]
«J. LAEVIGATA, n. s., PI. 47, fig. 84.
Shell thin, sub-orbicular, broad; lower valve convex, equilateral; surface polished and marked by about twenty scarcely perceptible broad ribs, represented internally by an equal number of pairs of thin threadlike ribs ending a little short of the margin of the shell; ears nearly equal; the right ear marked by three or four fine radiating, linear ribs. Upper valve slightly concave, the ribs being indicated externally by faint irnpressed lines, crossed by regular, fine lines of growth; internally this valve has the same character of ribs as the other. Length and width, each 1.3 inches.» WILLIAM MORE GABB, 1881
|
W. M. Gabb, 1881, plate 47.
|