Clare Island Survey — Land and Fresh-water Mollusca, 23 25 



Achill Island. 



The area of Achill — some fifty square miles — is best realized by one who 

 makes an attempt to survey a part of its fauna. Thus, although six and a half 

 days were spent by me on the island in addition to time spent there by 

 J. G. Milne and others, much work remains to be done. I do not anticipate 

 that a large number of species will be added to the list, but some that figure 

 below are perhaps commoner or more widely distributed than my work has 

 led me to believe. Owing to the considerable advance of our knowledge 

 since the publication of J. G. Milne's paper on the mollusca of the island 

 (1891), 1 it seems well to give a complete annotated list. Owing partly to tbe 

 great extent of the island and partly to the diverse character of its different 

 portions, I have divided Achill into three sub-districts, viz., North, South, and 

 "West. The southern division is bounded on the north by the road running 

 from the head of Salia Bay, past Lough Naneaneen and Loughannascaddy, 

 to Eiver and thence past Shruhillbeg Lough to the sea at Dookinelly. The 

 western portion is bounded on the east by the 200-foot contour-line, running 

 from near Corrymore House, through Slievemore village, and round the 

 eastern shoulder of Slievemore, down to the sea near the quay west of 

 Dugort. The northern district includes the intervening tract of com- 

 paratively low-lying ground, all the sand-dunes, and almost all the lakes 

 which yield fresh-water species. The letters N", S, and W, following the 

 name of a species, denote in which division it has been found. Additions 

 to Milne's list are marked *. 



List of Mollusks of Achill Island. 



Limax arborum Bouch.-Chant. — N.S.W. Generally distributed, and ranges 



to the highest point of the island, 2204 feet. 

 *[L. maximus L. — N. A few specimens in the village of Valley, associated 



with Sijgromia rufescens, and in all probability introduced by man.] 

 Agriolimax agrestis L.— NS.W. Common throughout the low-lying parts 



of the island, except on the most peaty areas, the vars. brwnnea, 



reticulata, and near the sea var. lilacina, predominating. 

 *A. laevis Mull.— N. Frequent round the shores of the lakes near Valley. 

 [Milax sowerbyi Per. — N. Beported by J. G. Milne from Dugort. Still 



found there, and also in the village of Valley. An evident introduction.] 

 M. gagates Drap. — N.W. Frequent. Mainly type and var. plumbea. One 



almost jet-black example at 800 feet altitude above the eastern 



Lough Nakeeroge. Var. rava — Slievemore village (J. G. Milne). 



1 Journal of Conchology, vi, 412-421. 

 8.I.A. PKOC, VOL. XXXI, D 23 



