i9o6. STKI.FOX.— Z. <Sf F. W. Mollusca of N. W. Donegal. 63 
are connected to the mainland at low water by sand banks, 
across which shells could easily be blown, and it seems quite 
possible that this might be the manner in which shells spread 
from the mainland to the islands. It also does not appear 
improbable that even the outlying islands may have been 
joined to the mainland, at some not very remote period, by 
this means, because as recently as fifteen years ago, Inishinny 
was connected to the Bunbeg dunes, while now there is at 
least 15 feet of water at the lowest tide separating them. Of 
the many inland lakes only two were closely searched — Dun- 
lewy Lough and Lough Veagh. The shores of these are, in 
parts, well wooded, and in consequence some species were 
found which were not met with on the unsheltered coastal 
areas. On our way home, we visited Horn Head — which, for 
all fauna records, might almost count as an island— Dun- 
fanaghy district and Glen Lough. At this point R, Welch's 
list, for the Rosguill and Sheepliaven areas, joins on. The 
season chosen for the visit was late September, so that the 
greater number of the species were well grown. The summer 
having been exceptionally hot and dry, we did not expect a 
large list, yet our ten days collecting resulted in sixty-four 
species being found. In the following list Dr. Scharff's 
nomenclature (as given in this Journal, vol. i., 1892) is 
adopted. 
Ivis'r OF Spkciks. 
Vitrir.a peilucida, INIiill.— Large specimeus common to all the saud- 
bills, smaller at Cileiiveagli and Glen Lough. 
Hyalinia celiaria, IMiill.— Must be considered a rare species in this 
district — was found alive at Middletown, Dunlewy, and Horn Head, 
though dead shells were very common in shell-pockets at Mullagh- 
derg and Carrickfin. 
H. ainaria, Miller. — Dark in colour and common in all places visited ; 
one specimen of var. viridnla was taken at Glen Lough. 
H. nitidula, Drap. — Dunlewy, Glenveagh, and Glen Lough. 
H, pura, Alder.— Though common v/itli H. ccllai-ia in shell-pockets, 
was only taken alive in same locality as last species. 
H. radiatula, Alder. — Generally distributed, but not common any- 
where, var. VII idesccnti-alha only seen at Glen Lough. 
H. crystallina, Mull. — This common shell was only found alive at 
Dunlewy, Glenveagh. and Glen Lough. 
H. fulva, Mull. — Generally distributed and not rare. 
A 4 
