HELIX. 385 
exactly resemble each other, and both represent a shell (Me- 
lania amarula, Sowerby, Gen. Sh. Mel. f. 1) whose characters 
harmonise with the few particulars enunciated in the ‘ Systema.’ 
The following passage in the ‘Museum Ulrice’ does not, how- 
ever, apply to the generality of specimens :—“ Striis copiosis- 
simis, minimis, albis—labium interius flavescens.”’ 
Helix staquatts. 
The Limneus stagnalis of authors (Turton, L. and F.W. Shells 
Brit. f. 104) is preserved in the Linnean cabinet, and exclusively 
corresponds with the definition of the species. 
Helix fragilis. 
As the list of those shells which our author possessed does 
not include this name, no aid can be derived from an inspection 
of his cabinet. It is certain that it was a Swedish member of 
the genus Limneus, but to what species it belonged has been a 
frequent subject of discussion. Draparnaud and the French 
favour the claims of palustris; Rossmiissler and the Germans 
lean to the opinion that it was either the young or a produced 
and scarcely angulated variety of stagnalis, such as the one 
represented by Turton (f. 105) in his ‘ Manual of the Land and 
Fresh- Water Shells of the British Islands.’ The positive deter- 
mination of the precise species without the citation of an illus- 
trative figure was hopeless; hence the manuscript selection of 
“List. 123, f. 21,’ in preference to “124,” settles the question ; 
the latter drawing represents palustris; the chosen engraving 
very fairly exhibits the rounded variety of stagnalis. Moreover, 
the expressions “alba” in the ‘Acta Upsal. 1736’ and “ pel- 
lucida” in the ‘Fauna Suecica’ are more suggestive of that 
species than of its duskier rival; nevertheless, as far as de- 
scription went, there was nothing to debar either shell from 
being the representative of the Helia fragilis. 
