miPPY— JAMAICAN TEETIAEY FOSSILS. 
85 
Monodonta lasilea n. sp. PI. I, f. 2, 
Top* shaped, umbilioate. Apex smooth, sharp. Ydhorls 
about 7, very strongly carinate, the stout Ireel on tho 
angular ridge bearing a row of rounded undulate tubercles 
and having near the suture a less distinctly marked keel, 
between which and the keel on the angle there is a slight 
concavity marked only by faint spiral ridges crossed by 
lines of growth. Lower half of last whorl forming the base 
covered with strong spiral ridges. Mouth subcircular. 
Columeilar lip callous, produced into a broad tooth above 
a short broad rather effuse canal. Outer lip dentate, 
grooved within. Total length about 15, greatest breadth 
about 12 millimetres. 
In general characters there is some resemblance between 
this shell and Trochus cypris Orb. (= Monodonta elegans 
Bast.) 
Meaera costellata Desh. 
Corhula vieta Guppy. 
Journ. Gaol. Soc. vol. xxii., p. 580, pi. xxvi. f, 8. 
Venus llandiam n. sp. 
Suborbicular, subequilateral, moderately convex, adorned 
with numerous equidistant concentric lamellae, between 
each of which there are about 7 or 8 concentric striae : 
somewhat ungulate in front and subirunoate behind : 
margins erenate. Lunuie smooth, impressed. Posterior 
dorsal area not defined, striate continuously with the 
lamellae of the disk, Umbones small. Cardinal teeth 2 
under the lunuie; lateral tooth 1 nearly halfway down 
the posterior slope. 
Bnf erred to hitherto in papers on Westindian fossils as 
Venus rugosa van , to young specimens of which species it 
bears a somewhat close resemblance. The Jamaican ex- 
