SOME PISIDIA FROM THE TARNS OF THE GALTEE MOUNTAINS, 
CO. TIPPERARY SOUTH. 
By C. W. Stelfox. 
There are four corries on the northern slope of the Galtees in which 
nestle five moraine-dammed tarns of varying size. These tarns lie at 
altitudes of from 1,600 to 1,900 feet. Several of the tarns have no proper 
outlet, and consequently the water level varies considerably according 
to the rainfall. In September, 1943, all the tarns were so full that I was 
unable to reach any habitat for Pisidia, while in 1944 (May-June) the 
level of all was much below the mean level and some of the beds of mud 
were well above water level. Taking the tarns in order from west to east 
I failed to find any in Lough Curra, though I have no doubt they occur 
beyond the reach of a scoop. L. Diheen yielded six specimens of a small 
rather starved form of P. cinereum ( casertanum ), with quite thick shells. 
These came from a stiff, red, cheesy mud, on the southern shore of the 
tarn, quite 10 feet below the water level of September, 1943. L. Borheen 
yielded four specimens of a corresponding form of P. nitidum , almost 
thick enough to be regarded as a form of var. crassa. From the largest 
of the tarns, Muskry L., I only succeeded after a long search in obtaining 
two specimens, one each of P. nitidum and P. subtruncatum, both with 
rather thick shells. The fifth — a small shallow tarn, separated from 
Muskry L. by an inner moraine, and at a slightly higher altitude, was the 
only one in which Pisidia were plentiful (i.e. within my reach). Here 
I took many specimens in a few minutes of two species, P. nitidum and 
P. hibernicum , in about equal numbers, but with rather thinner shells 
than those from the other tarns. 
