46 SPECIES OF THE SYSTEMA. 
Carvdimn Cardtssa, 
The Cardium Cardissa (Mawe, Conch. pl. 7, f. 8) still remains 
in its marked box in the Linnean cabinet. In our author’s own 
copy of the ‘Systema,’ “ List. t. 318” is annexed to the syno- 
nymy: in that of the younger Linné “latere altero e plano- 
concavo disco elevato” is likewise appended. As usual, the 
references to plates 42 and 43 of Rumphius’ ‘ Thesaurus’ are 
transposed : here plate 43 should have been quoted, not 42. 
GKardtum retusa. 
The Cardium retuswm (Chemn. Conch. Cab. vol. vi. pl. 13, f. 
139 to 140) of authors still remains in the marked box of the 
Linnean cabinet. It is, however, mixed with individuals of the 
C. subretusum of Sowerby (Conch. Illust. Card. f. 24), a shell 
which I can scarcely regard as more than a variety of it. As 
both will about equally agree with the description, it is expe- 
dient to retain the Linnean name for the earlier recognised 
species. 
Carvdtunr Henrvtearva tun, 
No shell in the Linnean cabinet will agree with the descrip- 
tion of this species. The quoted figures and the ample details 
of the ‘ Museum Ulrice’ so clearly indicated the Cardiwm hemi- 
cardium (Reeve, Conch. Icon. vol. ui. Card. pl. 7, f. 38, a) of 
authors that its recognition was effected at an early period. In 
the intended new edition Linneus has added ‘ Simillima priori, 
sed absque ano impresso: valvule punctis eminentibus exas- 
peratee.” 
The expression “at fasciis diversa,” in the ‘Museum Ulrice,’ 
is clearly a typographical error for “ at facies diversa.” 
