CARDIUM. 49 
Cardiwum tsocardta. 
The Cardium TIsocardia of authors (Wood, Gen. Conch. 
pl. 52, f. 1) is marked for this species in the Linnean cabinet, 
and in the revised copy of the ‘Systema’ there is added to the 
published synonyms “ List. t. 323.” 
Cardiunr frag. 
The Cardwm fragum (Wood, Gen. Conch. pl. 58, f. 1, 2) of 
authors is present in the Linnean cabinet, and alone agrees 
with the specified peculiarities of this species. Our author 
has, moreover, correctly cited “ List. t. 815, f. 152” in his 
manuscript. 
Of the published references, the figure of Rumphius, though 
rude and probably not designed for this shell, conveys some 
idea of its general aspect: the engraving of Gualtier, on the 
contrary, should rather have been referred to Isocardia. 
Cardin wnedo. 
It was almost impossible for naturalists to avoid identifying 
so peculiar a looking shell as the Cardiwm unedo, especially 
with such a correct synonymy. ‘The box thus marked in the 
Linnean cabinet still contains the species (Wood, Gen. Conch. 
pl. 58, f. 3) so long determined. Our author, in his manuscript, 
has added “ List. t. 315” to his former synonyms. 
Cardtunrt murtcatun. 
The box thus marked in the Linnean cabinet contains the 
Cardium muricatum of conchological writers (Wood, Gen. 
Conch. pl. 51, f. 2), which fairly enough (yet not perfectly) 
corresponds with the description. 
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