204 
LIMN^AD^. 
Ann. and Mag. Nat. Hist. ii. 396. t. 11. fig. upper (1846) ; 
Forhes and Hanley., B. M. iv. 172. t. 123. f. 8, 9. 
Inhab. lakes, Scotland and Wales. 
Monstrosity 1., with the outer lip thickened, with an internal 
rib, and expanded {Maton., Linn. Trans, viii. 218. t. 5. f. 8.*; 
Montag. Supp. 129.) : Lymnea marginata. Michaud., Compl. 
88. t. 16. f. 15, 16. 
Monstrosity 2., spire reversed : Limnea lineata. Bean., Mag. 
Nat. Hist. vii. 493. f. 62. Lymnea marginata. Michaud., 
Compl. 88. t. 16. f. 15, 16. 
Inhab. Scarborough. 
Inhab, ponds and ditches. 
Animal olive, yellow-spotted. (^Sturm^ t. 39.) 
Shell varying much in size, of a greyish 
or yellowish colour, more or less con- 
centrically striated ; spire moderately 
elongated, about a third part the length 
of the whole shell, with the lesser vo- 
lutions not so abruptly disproportion- 
ate to the body one as in the former ; 
aperture oval-oblong, with the um- 
bilicus sometimes obliterated, (fig. 50.) 
The shells are often covered with a calcareous fur 
or deposit, which nearly hides them, and which has 
been sometimes mistaken for periostraca. 
All the varieties run so much into each other, 
that they can hardly be considered as specifically 
distinct. 
Mr. Jeffreys says, I have no hesitation in refer- 
ring the Helix lutea of Montagu to a variety of this 
species, having found it, both in a living state and 
thrown up together with other varieties, on the sea- 
shore near Swansea, within the influx of the Britton 
Ferry river.” Nilson describes one species as living 
in brackish water in Sweden. The varieties of the 
Fig. 50. 
L. pereger. 
