IQI2. SteIvFOX. — Terrestrial I\Iollusca of the Blaskets. 187 



there is good evidence to the contrary ; it seems to me safer to regard 

 with suspicion — as most botanists do — any specimen which cannot 

 honestly be considered native. 



L. cinereo-niger Wolf. — One fine specimen under a stone in the dry bed 

 of the small rivulet, which in wet weather flows into the gully 

 a quarter of a mile east of Bannig, on the south coast, and a half- 

 grown example under a stone above Coosnacrissaun on the north slope 

 of the island. Both examples were of a pale yellowish -brown ground- 

 colour, with darker spots. A very beautiful variety. 



L. arborum Bouch. -Chant. — In extraordinary abundance along the 

 rocky slopes of the southern coast at night and evidently feeding on 

 the lichens which cover the surface of the rocks. It is to be met with 

 also on the greater portion of the island from close to sea -level to the 

 summit, 961 feet. The prevailing form seems referable to var. 

 alpestris Less, and Poll. 



Agriolimax agrestis (L.) — Not seen in the drier parts of the west end, 

 but elsewhere common from sea -level to summit. Mainly typical 

 in colour, and the brownish form which prevails on the islands of Mayo 

 and Donegal appeared rare. 



Milax gagates (Drap.) — Very common along the north-western cliffs 

 opposite Illaunbaun and above Coosnafinnisha, but not seen in any 

 other part of the island. All specimens were referable to var. plunibea 

 and rather small in size. 



Vitrina pellucida (Mtill.) — A single dead shell was taken under a stone 

 beside the ruined Signal Tower at 765 feet altitude. No doubt 

 common in winter and spring. 



Hyalinia cellaria (Mull.) — On the more northern islands and along the 

 coast of western Ireland this species has always proved, so far 

 as my experience has gone, to be an absentee from the cliffs, and 

 confined to the cultivated areas, and thus its standing as a native in 

 those districts has always appeared doubtful. On the Great Blasket, 

 however, its large form ( = Vitrea hibernica Kennard) is abundant on 

 many parts of the cliffs, particularly near Coosnacrissaun, and at 

 about 800 feet altitude on the northern escarpment of Slievedonagh. 

 Here, in fact, this shell takes the place usually filled by H. alliaria 

 on the western islands, as the characteristic species of the genus. On 

 the opposite mainland of Kerry H. cellaria lives on the northern 

 cliffs of Brandon to a height of at least 1,250 feet, its highest recorded 

 station in Ireland. 



H. alliaria (Miller). — Occurs sparingly over the greater part of the island 

 almost to the most western point. Mainly typical. 



H. nitidula (Drap.) — The usual western form with drooping and expanded 

 body -whorl occurred in several places on the cliffs ; but it was 

 common only in one place at Foilbeg. Several white specimens were 

 noted, while most were pale in colour, 



H. pura (Alder). — On the northern cliffs : frequent. Mainly of the 

 typical form. 



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