1 88 The hish Naturalist,. October, 



Hyalinia radiatula (Alder.) — Sparingly round ttvn north-western corner of 



the island ; but not seen elsewhere. 

 H. crystallina (Mull.) — Rare and only seen occasionally. A small form. 

 Euconulus fulvus (Mull.) — Several large dead shells at Foilbeg. Evidently 



not a common species on the island. 

 Arion ater (L.) — Frequent but not often abundant. Vars. castanea, 



plumhea and atcrrima were noted. 

 A, subfuscus (Drap.) — Very scarce and only seen near the village and 



along the north-eastern cliffs. 

 A. intermedius Nomiand. — Many examples of the bright yellow form 



on the damper parts of the cliffs. The grey form was noted also, 

 Sphyradium edentulum (Drap.) — Near the site of the ruined beehive 



huts above Poulabauser, and at Foilbeg. 

 Pyramidula rotundata (Mull.) — With the possible exception of Pupa cylin- 

 dracea this must be looked upon as the dominant species over the 

 greater part of the island. Many colonies of the whitish -green form 

 were observed, while most specimens were pale in colour. 

 Helicella virgata (Da Costa). — Abundant at Trabane, Var. suhmaritima^ 



common ; var. albina common ; typical form rare. 

 H. itala (L.) — Common on the sandy cliffs at Trabane. 

 H. intersecta (Poiret). — Common in the deposits at Trabane, but rare 

 alive. Also lives on the dry slopes above Coosnafinnisha with V. 

 pulchella. 

 H. barbara (L.) — Abundant in the sandy fields and on the slopes at the 



western end of Trabane. 

 Vallonia pulchella (Midi.) — On the dry grassy slopes above Coosnafinnisha 



at the north-western corner of the island. 

 Helix aspersa (Mull.) — Abundant at Trabane and in the fields near by. 

 H. nemoralis (Mull.) — Occurs over the greater part of the island below 

 300 feet, and common in many of the gullies along the north coast 

 and at Trabane. This was one of the few species seen in the arid 

 wastes towards the west end of the island. A large race occurs in 

 the sheltered parts of the great gully of Foilbeg and also in the deposits 

 at Trabane. 

 The following forms were taken on the island : — 



aiiraniin 12345. libelhila 12345. 



(123) (45) (123)45. 



I (23) (45)- I (23) (45) 



(12) 345. I (23) (45). 



(12345). (123) (45). 



00300. 12045. 



00000. 00300. 



castanea 12345. 00000. 



(12345). 

 00300. 

 00000. 

 One specimen of the var. alholahiaia was taken at Foilbeg ; the remain- 

 ing specimens all had black or purple lips. None of the castanea form 

 were taken except on the sand at Trabane, where specimens with £^ band 



