352 SPECIES OF THE SYSTEMA. 
species resulted, in all probability, from a perusal of the lan- 
guage of the ‘Fauna Suecica;’ for the cited figure of Lister 
(Anim. Angliz, pl. 2, f. 11) is too ill executed to aid an identi- 
fication ; indeed, it would rather have led them astray, for it 1s 
engraved as dextral instead of sinistral. In the manuscript of 
the younger Linné I find a reference to plate 41, f. 39 of 
Lister’s ‘ Historie Conchyliorum,’ which, although not intended 
to represent a Balea (it has been quoted for Clausilia nigricans 
by Dillwyn), nevertheless approaches it in general features. 
SCurbo witscovrtu. 
This shell (Plate IV. f. 6) still remains in the collection, is 
enclosed in a paper inscribed by the hand of Linnzus, and is 
the sole species in the entire cabinet which at all agrees with 
the diagnosis. It is a curious edentulous variety of the Pupa 
marginata of Draparnaud, to which species it had been assigned 
by Nilsson, in his valuable treatise upon the land and fresh- 
water shells of Sweden, a work especially illustrative of the 
Helices and Turbines of the ‘ Fauna Suecica.’ From a sentence 
in the last-mentioned work “‘ apertura ovato-acuminata, mucrone 
obtuso” we are led to imagine that our author was aware of 
the frequent presence of a denticle in the mouth of the shell, 
although in the ‘ Systema’ he has termed it edentulous. None 
of the Linnean examples, however, are provided with a tooth ; 
yet in England, where this Pupa is most abundant, it is rarely 
that we obtain an example which is not thus furnished. 
Turbo atviscalptun, 
When two or three very small species succeed each other, in 
the arrangement of the ‘Systema,’ they are generally found in 
the cabinet of our author wrapt up in the same paper, or 
enclosed in the same little box. I consequently remarked 
along with No. 650 a specimen, which, upon comparison with 
the several diagnoses, agreed with Turbo auriscalpium alone ; 
neither could the most diligent search discover any other shell 
