i9o6. WEI.CH.— & F. W. Mollusca of N. W. Do7iegaL 69 
Helix pulchella, Mull.--Alive under stones at Rosapeiina. Common 
in shell-pockets and old land-shell deposits there and at Trana- 
rossan. 
H. acuieata, Midi. — A few only in shell-pockets at Rosapenna. 
H. hispida, h. — A small dark form on Ganiamore and at Mevagh ; 
Doe Castle. Abundant in shell-pockets. 
H. rufescens, Penn.— One locality only — among nettles on Gania- 
more, 
H, ericetorum, Mull.~In myriads all over the Tramore dunes, 
Rosapenna, and at Tranarossan — many abnormal in shape. Near the 
north end of Rosguill, this species lives as high up the mountains 
as the fine shell-sand blows, well over 200 feet ; but where the sandy 
turf stops and the peaty ground commences, it is no longer to be 
found. This may be well seen where a band of wind-blown sand 
crosses the hills from east to west in a narrow pass south of Melmore 
Lough. 
H. acuta, Mull. — Almost as common as the last. More so on the 
short wind-cut turf at Muslac cliffs. 
H. ncmoralis, L.— Quite as abundant on the sand-hills as in other 
west Donegal localities. Plentiful in the kitchen-midden black zones 
at Rosapenna, and in almost all the land-shell deposits. I did not 
notice any sinistral specimens, though J. R. B. Masefield, of the 
Conch. Soc, found some at Rosapenna a few years ago. 
H. aspersa, Mull. — Local on Rosguill, a few on south slope of Magh- 
erachuUion Mt., and in crevices of rocks at east side of Tranarossan 
sand-plain. 
Cochlicopa lubrica, Mull.— Common, a small form in moss on sand- 
hills at Rosapenna and in large quantities in the "pockets." 
Pupa cyiindracca, Da Costa.— Seems rare on Rosguill so far as 
living specimens go, but with the next it occurs in the shell-pockets, 
though less commonly. 
P. muscorum, Mull. — Alive under stones, locally, at Rosapenna. 
Very common in shell-pockets. 
Vertigo pygmaea, Drap. — Many in shell-pockets; alive but not 
common near Carrigart. 
V. angustior, Jeff. — Dead shells only, abundant in all the "pockets" 
and in old deposits on Rosguill, but I found perfectly fresh-looking 
specimens on the Doaghmore dunes in Fanad, on the east side of 
Mulroy Bay, that seemed not long dead. 
Balea perversa, L-— A few on trees at Doe Castle. 
Clausilla toidentata, Strom. — Very sparingly at one or two rocky 
localities near base of Ganiamore in 1893 and 1904. In comparison 
with its present scarcity the former abundance of this species is in- 
teresting. It occurs in some of the old laud-shell deposits, under 
some of the dunes at Rosapenna in the greatest profusion ; thousands 
may be collected in some of the larger dune hollows, yet not a trace 
of the living animal now to be found on or near the dunes any where. 
