TURBO. 825 
bestowed the Linnean appellation upon a Cerithiwm which he 
regards as the species of the ‘Systema.’ The C. punctatum of 
Bruguiére was not designed for the Linnean shell. 
Crochus striatellhis. 
Unfortunately this ambiguous species, whose brief descrip- 
tion, unillustrated by references to any engravings, was far too 
inadequate to enable naturalists to determine the intended 
shell, was not possessed by our author. Attentive perusal of 
the diagnosis, however, impresses one with the idea of its having 
been either a Chemnitzia or a small Cerithiwum. Although the 
paucity of the indicated characteristics leaves ample range for 
conjecture, Chemnitz has not noticed the species; nor have 
Gmelin, Schréter and Dillwyn added aught to the original 
description. Bruguiére, alone, has ventured to refer it with 
doubt to the Cerithiwm zonale, with which one of the very few 
characters mentioned, “alba, apice violacea,” is discordant. 
As no certain identification can ever be ensured, it is far better 
to wholly omit the name from our catalogues. 
Us: Oo 
Gurbo obffusatus. 
Many writers have imagined that this and the Neritoides of 
authors (not of Linnzus) were but varieties of the same shell. 
The supposition is erroneous, as the marked specimen (Chemn. 
Conch. Cab. vol. v. pl. 185, f. 1854, Nos. 3, 4, 5, probably) in 
the Linnean cabinet is a very distinct species, and very nearly 
approaches the Littorina ordinarily recognised as the Turbo 
obtusatus of Lamarck’s ‘ Animaux:’ all the examples present, 
