160 FARRER: MOLLUSCA OF THE ENGLISH LAKE DISTRICT. 
Planorbis albus (L.).—Common on lily pads, etc., in the 
lakes and becks. 
Pl. spirorbis Mill.—Ditches at Keswick and Bassenthwaite 
and in Derwentwater, near Lodore Hotel. 
Pl. vortex (L.).—Frequent throughout in the same situations 
as the last species. 
Pl. carinatus Miull.—I have only taken this shell at Little 
Tarn, near Bassenthwaite. All the specimens are very light 
coloured. 
Pl. contortus (L.).—Common on lily pads and other water 
plants. 
Physa fontinalis (L.).—Very rare and small. I have taken 
it at Little Tarn, Grasmere, Windermere, and Thirlmere. 
Limneea peregra (Miill.).—Very common, and running into 
many varieties. I have taken a few of the var. Lovssy¢ 
Dupuy. Wherever watercress abounds in the streams I 
have noticed the shells to be much eroded—indeed, - 
nothing but the body-whorl is left in many cases ; and thus 
the shells appear at first sight to be the rare var. Burnett. 
L. palustris (Miull.).—Common in all the slow-running ditches 
but rather stunted in size. 
L. truncatula (Miill.).—Very common, and in some localities 
unusually fine. 
L. glabra (Miill.).—Not common in the district. In a drain at 
Bassenthwaite it occurs in quantity, and very large specimens 
may be taken; monst. decol/atum is found with the type. 
Ancylus fluviatilis Miill—In all the swift-running becks, 
and often large in size. Vars. g7bbosa and albida also occur. 
I find this species coupling in May. 
Velletia lacustris (L.).—On reeds, Bassenthwaite Lake, 
Little Tarn, and in a ditch near Piel Wyke. Rather rare. 
Acicula lineata (Drap.).—I have found this species only in 
one locality, .viz., near Bassenthwaite. It exists in vast 
numbers, and when I say I have filled a two-ounce vial 
J.C., viil., Jan. 1896. 
