310 . SPECIES OF THE SYSTEMA. 
entire collection, wherein its presence is asserted in the list 
that accompanies the tenth edition, at all suits the definition, 
yet, as no mention of it occurs in the final list (moreover, it 
equally suits the description of Buccinwm murinum), no proof 
of its identity can be derived from that circumstance. Never- 
theless probability and tradition favour its pretensions. A 
closely allied, if indeed distinct shell, the Cerithiwm radula of 
authors (M. fuscatus of Linneus), has been suggested as the 
more fitting representative; it is scarcely likely, however, that 
its spinous knobs would have escaped comment, or been 
regarded as simple tubercles. 
Survex asper. 
The Cerithium asperum (Mawe, Conch. pl. 26, f. 6) of authors 
is marked for this species in the Linnean collection, and thus 
confirms a recognition, which, from the paucity of the recorded 
features, and the absence of illustrative synonyms, was, of 
necessity, somewhat conjectural. The “singulis 4 pluribus; 
ore spimis, &c.” ig so obscure in meaning, that I cannot but 
surmise it to have been a misprint for “singulis 4 pluribusve 
spinis, &c.” 
It is somewhat singular that all but the first of the four 
synonyms attached to the next species belong properly to this 
shell. Might it not have been an error of transcription or of 
the press ? 
slurex granulatus. 
The “ cauda acuta, ascendente”’ forbids our identification of 
this shell with the Cerithiwm granulatum figured by Kiener, 
the drawing of which in Bonanni (pt. 3, f. 327) would scarcely 
have been unnoticed by Linnzus had perfect examples been 
observed by him. Whether the latter can be the species so 
named by Bruguiére seems to me somewhat questionable. 
The synonymy would have been more appropriate for the 
preceding species, to which three of the cited figures bear 
