41 
CARDIUM. 
Gen. Char. Shell an equivalved bivalve,, sub cor- 
date ; valves dentated on their inner margins ; 
hinge with central and lateral teeth, the two 
central ones oblique, approximating ; those in 
each valve crucially receiving each other by 
mutual insertion ; lateral ones remote and in- 
serted. 
CARDIUM Hillammi. 
TAB. XIV . — Upper figure . 
Spec. Char. Shell nearly circular, a little oblique, 
covered with numerous concentric striae, an- 
terior part straightish at the edge, longitudin- 
ally furrowed. 
This species is rather wider than long, it is a little gibbous ; 
the rising spaces between the striae are smooth, giving a 
peculiar neatness to the shell : the longitudinal furrows 
occupy about one fourth of its breadth. 
A remarkably elegant species, with fine specimens, of 
which I have been favoured by Miss E. Hill, of Tawstock, 
a Lady well known for her great attention to Fuci, &c. who 
desirous of seeing every thing figured from as good speci- 
mens as possible, presented me with her very best. Find- 
ing Mr. Parkinson at a loss for a name, and that the shell 
was sufficiently distinct from Cardium discors of Lamarck, 
I call it Hiilanum thinking Miss Hill’s attention and assiduity 
highly deserves to be remembered. The shells are siliceous, 
and are from the remarkable micaceous Sandstone stratum 
at Blackdown, near Cullumpton, Devonshire, a place rich 
in such curious productions, as will occasionally be shewn. 
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