204 LIMNJEAD^J. 



Ann. and Mag. Nat. Hist. ii. 396. t. 11. fig. upper (1846) ; 



Forbes 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.) 



Fig. 50. 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 ; 



Jj.pereger. J 



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 



