FARRER: MOLLUSCA OF THE ENGLISH LAKE DISTRICT. 153 
cult to find; especially is the genus Spherium noticeable 
by its absence, for although Miss Donald, of Carlisle, has re- 
corded it from the ‘‘River Derwent at Piel Wyke,” in a ‘‘List of 
the Land and Freshwater Shells of Cumberland and Westmore- 
land,” published in part VIII. of the “Transactions of the 
Cumberland Assuciation for the Advancement of Science,” 
some few years since, I have looked for it in vain. In any case 
the locality given must be a mistake, as the Derwent does not 
approach Piel Wyke by at least two-thirds of a mile. 
That we find no trace of the Anodons is not surprising 
when we come to consider the stony nature of the lake 
bottoms and the rapidly flowing nature of the rivers and moun- 
tain streams ; and no doubt it is from a like reason the mud- 
loving Unio pictorum and U. tumidus are absent from the list. 
Probably further search will bring to light other species 
which have so far escaped my notice, although I have endea- 
voured to make a systematic collection during this and last 
season. 
The arrangement followed is that of the Conchological 
Society’s list of 1892. 
Arion ater (L.).—Very common throughout the entire 
district, the only variation noticed being var. rufa. 
This species I have commonly taken feeding on different 
species of the boletus tribe in pine plantations. 
A. subfuscus Drap.—Abounds in all the low-lying meadow 
lands bordering the lakes. I have noticed as many as 187 
individuals feeding on the remains of a dead frog. About 
Bassenthwaite the var. aurantiaca prevails, and the en- 
trances to water-rat burrows are at times fairly lined with 
this variety—no doubt feeding on the rat droppings. 
A. hortensis Fér.—Very common in woods, hedgerows, and 
gardens, and plays sad havoc with the cabbages in the 
latter. 
A. circumscriptus Johnst.—Usually found with the above, 
but seems to prefer the woods. 
