GUPPY — SHELLS OF TBINIADD. 
367 
sive sutural lamellae ; anterior canal open and a little reflect- 
ed. Pillar lip smooth, flattened or hollowed out, bright pink ; 
outer lip denticulate, obsoletely striate within. Height 40 
millimetres, greatest breadth 27 mill., longest diameter of 
aperture 26 mill. 
A species somewhat resembling P. mancinella , but with 
a sharper spire and a more decided striation. The sutural 
lamellae are well developed like those of P. coronata. There 
is a strong ridge round the base. Gulf of Paria. 
Cardium eburniferum n. sp. 
Shell a little angularly suboval, moderately tumid : exter- 
nally marked with irregular orange-brown spots, and adorned 
with 35 narrow imbricated ribs closely covered towards the 
margins of the shell with numerous porcellanous semitubular 
tubercles, which are thicker anteriorly ; posterior edge nearly 
straight, strongly serrate. Hinge-teeth ^ | — strong. 
Interior salmon-color, growing white towards the strongly 
dentrate margins which are yellowish. Height 52 mill., 
length 45, thickness 40. South Coast of Trinidad (T. W. 
Carr). 
Cardium haitense Sowerby. 
Quart. Journ. Geoi. Soc. vol. vi, p. 52, pi. x, f. 11. 
An oblique subovate shell with 20 — 24 radiating nodose 
rather square ribs wider than their finely crenate interstices. 
Allied to C. subovale Brod, 
This was originally described by Sowerby as a fossil from 
Haiti, but I have dredged two small examples of it in the 
Gulf of Paria, 
