23 26 Proceedings of the Royal Irish Academy. 



Vitrina pellucida Mull. — N.W. Generally distributed, but nowhere so 

 common as in the northern parts of Ireland. 



Hyalinia cellaria Mull. — N.S. Near habitations, and in the old church at 

 Kildawnet. In the latter locality only the var. margaritacea Schmidt 

 (var. alba, J. G. Milne) was observed. Milne states that this white 

 form does not occur on the island. 



H. alliaria Miller. — N.S.W. Generally distributed up to at least 800 feet, 

 the type being slightly commoner than the var. viridula. 

 *H. nitidula Drap. — N.S.W. Frequent on the northern cliffs and in similar 

 damp and shady spots. At the foot of the cliffs between the two 

 Loughs Nakeeroge, the var. helmi occurred commonly and without 

 the type. The latter form was taken on the sea-cliff of Croaghaun 

 at 1400 feet. 

 *H. pura Alder. — S.W. Frequent on the cliffs, and met with at Kildawnet. 



H. radiatula Alder. — N.S.W. Generally distributed. 



H. crystallina Mull. — N.S.W. Generally distributed, but seldom common. 



Euconulus fulvus Mull. — N.S.W. Generally distributed. 



Zonitoides nitidus Mull. — N. Regarded by J. G. Milne as that species 

 " which above all would appear to be a survival of forest times." 

 It is, however, in this country — so far as my experience has gone- — 

 essentially a marsh or lake-side dweller. It occurs sparingly on 

 the warren near Valley and by Keel Lough. 

 *Z. exeavatus Bean.— S. The type appears abundant in the woods at 

 Glendarary, while a few specimens of the var. vitrina occurred to 

 me by the shore, near the same locality. 



Arion ater L. — N.S.W. Generally distributed. Vars. castanea and plumbea 

 frequent near the sea. On the elevated peaty areas the var. aterrima, 

 Taylor, was alone met with ; this form is common to the highest point 

 of the island, over 2200 feet. 



A subfuscus Drap. — N.S.W. Generally distributed up to 1800 feet. The 



prevailing form appears referable to var. cinereo-fusca. 

 *A. intermedius Normand. — N.S.W. Generally distributed. Almost all the 

 specimens seen by me were of the grey form. 



[A. hortensis Fer. — N.S. (? W.). Recorded by J. G. Milne from the gardens 

 at Dugort — where it has probably been brought with plants — and from 

 the Signal Tower. A. intermedius is common at the last station, 

 though not mentioned by Milne ; I am therefore inclined to regard this 

 record as due to an error of determination, as it would be a most 

 unlikely habitat for A. hortensis. In the plantation at Glendarary, this 

 slug is abundant ; and though it has all the appearance of a native, 



