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Monodonta basilea n. sp. PI. I, f. 2* 
Top-shaped, umbilicate. Apex smooth, sharp. Whorls 
about 7, very strongly carinate, the stout keel on the 
angular ridge bearing a row of rounded undulate tubercles 
and having near the suture a le.ss distinctl}’ marked keel, 
between which and the keel on the angle there is a slight 
concavit}’ marked only b}' faint spiral ridges crossed by 
lines of growth. Lower half of last whorl forming the base 
covered with strong spiral ridges. Mouth subcircular. 
Columellar 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. {—Monodo 7 ita elegans 
Bast. ) 
Neaera costellata Desh. 
Corbula vieta Guppy. 
Journ. Geol. Soc. vol. xxii, p. 580, pi. xxvi, f. 8. 
Venus blayidiana n. sp. 
Suborbicular, subequilateral, moderately Comdex, adorned 
with numerous equidistant concentric lamellae, between 
each of which there are about 7 or 8 concentric striae ; 
somewhat angulate in front and subtruncate behind : 
margins crenate. Lunule smooth, impressed. Posterior 
dorsal area not defined, striate continuou.sly with the 
lamellae of the disk. Umbones small. Cardinal teeth 2 
under the lunule ; lateral tooth i nearly halfway down 
the posterior slope. 
Referred to hitherto in papers on Westindian fossils as 
Venus rugosa var. , to young .specimens of which species it 
bears a somewhat close re.semblance. The Jamaican ex- 
[*Geological Magazine, vol. ii, 1874, pi. 16]. 
