272 STANDEN AND HARDY: MOLLUSCA OF OBAN AND LISMORE. 



red-lipped specimens with nearly black shells. The pale 

 white-lipped form— var. pallida Jeff. — also occurred. 



P. cylindracea Da Costa. — Abundant, in company with the 

 above, and a few near Dunollie Castle. Very variable in 

 size, and light-coloured. Also common everywhere on 

 Lismore, and more uniform in size. Adult shells were full 

 of young ones, which came out freely in cleaning. 



P. mu SCO rum L. — A few very much weathered specimens 

 under stones near the shore on Lismore. 



Vertigo antivertigo Drap. — We found this species in great 

 abundance on the shore of Lochan Dubh. The dead 

 stems of last season's growth of bulrushes had drifted to 

 the side in heaps, and on these the Vertigoes were found 

 crawling, often quite in the water and always on wet stems. 

 The shells are very dark and beautiful, and not in the 

 least weathered. 



V. pygmaea Diap. — Found at one spot only, near the " Dog 

 Stone." Very scarce, but occurs alive. Chiefly from 

 moss-shakings. 



V. substriata Jeff. — Several very beautiful live specimens in 

 moss-shakings from near Dunollie Castle. 



V. edentula Drap. — Several specimens under dead sticks near 

 the " Dog Stone," and in Dunollie Woods. In the pine 

 woods at Ardbhan Craigs it is in some parts the commonest 

 sliell. At one spot in particular where a great pile of loose 

 stones had slipped from the face of the cliff, and become 

 overgrown with moss, every stone lifted was certain to have 

 this species clinging underneath, as many as 18 specimens 

 being taken from one small stone. On Lismore only very 

 few were found, and these under logs at the edge of a 

 small wood. 



Balea perversa L. — Very abundant on moss-covered rocks 

 on the roadside near Oban Station. 



Clausula rugosa Drap. — Not uncommon anywhere in the 

 Oban district, chiefly variety tumidula Jeff. Specimens were 



J.C, vii., Oct. 1893. 



