342 SPECIES OF THE SYSTEMA. 
place of that appellation by which it is so generally known, 
but would merely suggest the citation of the Linnean species 
with a mark of doubt in our future synonymies of elegan- 
tissima. 
Gurbo strtatulus. 
Much uncertainty has prevailed respecting this species. 
Gmelin merely transposed and slightly abridged the original 
description; Chemnitz and Schréter have left it in its pristine 
obscurity. Regardless of the forbidding “turrita,” the English 
writers (Montagu, Dillwyn, &c.) have selected a short-spired 
Littoriniform Rissoa for its representative. Philippi has doubt- 
fully cited it for Chemnitzia elegantissima, of which the sculpture 
is too simple to suit the diagnosis. 
Should we understand the word “cingulis” in its ordinary 
modern sense of spiral belts (not as simple belts traversing the 
volutions in either direction) the position of this shell in the 
longitudinally ribbed group of Turbines would be especially ill 
chosen: and if we are so to take it, it must be confessed that 
no shell in the collection of Linneus (albeit that he has de- 
clared its presence therein) will answer to its description. It 
is certain, however (from its use in the definition of T’. clathrus) 
that the expression merely signified a belt-like projection, the 
inclination, whether horizontal or perpendicular, when not 
specified, having to be gathered from the context. 
A careful and tedious analysis of the cabinet of Linnzus has 
demonstrated that only one species therein will agree with the 
described features, and that so perfectly that no reasonable 
doubt of its being the actual type can be entertained by any 
unprejudiced mind. It is, as a study of its characteristics in 
the ‘Systema’ led me to anticipate, a Chemnitzia, and its 
peculiar varicose sculpture corresponds precisely to the “ pas- 
simque rugis convexis callosis” of the description. The 
specimen, of which I cannot find any published delineation, has 
been engraved in plate 5, figure 8 of the present work. It is 
the C. varicosa of Forbes (AX gean Moll. in Brit. Assoc. Report), 
as I have determined by the comparison of it with a typical 
example received from the author. 
