390 SPECIES OF THE SYSTEMA. 
Helix Mevitowea, 
Schréter has justly observed that the cited figure of Gualtier, 
who has delineated a pure white granulated shell, does not 
agree with the language of Linnzeus in respect to this species. 
It, however, exhibits the general aspect of that shell (Sigaretus 
Halwotideus, Sowerby, Gen. Sh. Sig. f. 2) in his cabinet, which, 
from its exclusive correspondence with the diagnosis in the 
‘Systema,’ and perfect accordance with the enlarged description 
in the ‘Museum Ulrice, was undoubtedly the species meant 
by Linneeus, who has recorded his possession of an example. 
The S. cymba of Menke, a Peruvian shell, which from the 
expression “testa livida” (explained in the ‘Museum’ by 
“‘mucrone—livida—fauce livida’”’) has been suggested as the 
true representative, is not present in the collection of our 
author, who has referred the figure of it in Bonanni, and 
a drawing in Lister which greatly resembles it, to H. Halio- 
tidea. 
Helix pervsptcua. 
Tn the entire collection of Linnzeus only one shell corresponds 
with his description of this species. It proves to be, as Philippi 
had pronounced, the Coriocella perspicua of his ‘ Enumeratio’ 
(Moll. Sicil. vol. i. pl. 10, f. 5; vol. i. p. 142), the Bulla Halio- 
tidea of the earlier British writers. 
Helix Haltotidea, 
One species only in the Linnean cabinet, and our author has 
recorded his possession of an example, strictly agrees with his 
account of this shell. It is the Sigaretus engraved in the fourth 
plate (f. 7) of the present work, of which Linneus at that 
period was unable to find the delineation of an adult specimen, 
