78 SPECIES OF THE SYSTEMA. 
with gibbia, but whether it may not be expedient, in a case of 
doubt like this, to accept the traditional identification (Circe 
pectinata, Encycl. Méth. Vers, pl. 271, f. 1) must be left to the 
judgment of my readers. 
Venus sevipta, 
Had the identification of this well-known shell depended 
upon the cited figures, our recognition would inevitably have 
proved erroneous or imaginative ; for none of the engravings 
display those essentials that are demanded by the diagnosis. 
All the figures are very rude, and, with the exception of that in 
Gualtier, which exhibits a close, concentric striation, only 
resemble scripta in painting; none appear angulated at the 
extremity; those of Argenville and Rumphius are represented 
smooth-surfaced and suborbicular. 
Thanks to the description in the ‘Museum Ulrice’ natural- 
ists have correctly divined the intended species. One specimen 
(Sow. Thes. Conch. vol. u. pl. 139, f. 38) alone in the entire 
Linnean collection, the Circe scripta of Sowerby’s Monograph, 
will agree with the description: hence, as our author has indi- 
cated his possession of the shell, no reasonable doubt of the 
typical authority of the example can be entertained. After 
“impressio ani lanceolata” the Linnean MS. adds “ut vulvee 
similis”: ‘int.’ for ‘“margine integerrimo” is likewise ap- 
pended. 
Venus eventula, 
Not many years ago only a single edentulous Lucina was 
known which corresponded satisfactorily in other respects with 
the described features of this shell: hence, it was accepted 
generally as its representative. At the present period, when 
the annual increase on the number of described T'estacea aver- 
ages at least one-third of the total number determined in the 
age of Linneeus, the discovery and segregation of many tooth- 
less Lucine, by compelling a stricter interpretation of the 
