LAND AND FRESHWATER MOLLUSCA OF SCOTLAND 151 



the vice-counties concerning the land and freshwater mollusca of 

 which scarcely anything is known or on record. So far we have 

 only had thirteen authentications, and it is much to be wished that 

 some active conchologist would make it his concern to visit the coast- 

 line and search it well, from Newburgh and the Ythan mouth round to 

 Aberdour, and permit our referees to see the results of his labours. 



49. LlMN^EA PEREGRA AN ADDITION TO THE DUMBARTONSHIRE 



LIST. To Mr. G. A. Frank Knight we are also indebted for several 

 Dumbartonshire shells, one of which the ubiquitous Limnaa 

 peregra is an addition to the authenticated list. The specimens 

 sent, two in number, were of the var. ovata, and were collected at 

 Craigton, Milngavie. Other shells sent from this county were Helix 

 rufescens from Bearsden, near Glasgow, H. rotimdata from the Kil- 

 patrick Hills, Vitrina pellndda from Kilpatrick and Bearsden, 

 Cochlicopa lubrica from Kilpatrick, Helix aspersa from Helensburgh, 

 and the Sucdnea to be mentioned in my next paragraph. 



50. SUCCINEA PUTRIS, AN ADDITION TO THE DUMBARTONSHIRE 



AND MAIN ARGYLESHIRE LISTS. Mr. G. A. Frank Knight sent us 

 a couple of examples collected in the River Loin near Arrochar. 

 As the river appears to be the dividing line of two counties, it would 

 appear to be unavoidable to add the species to the authentication 

 lists for both areas. 



51. PlSIDIUM PUSILLUM AN ADDITION TO THE CLYDE ISLANDS 



LIST. Mr. Knight has favoured us with examples of this bivalve 

 from lorsa Water, Arran, an addition to the list for the vice-county. 

 From lorsa Water also were sent very numerous and very small 

 examples of Ltmncea peregra var. minor, and from Machrie Water, 

 Arran, numerous examples of the same species. From the Bull 

 Loch, island of Bute, were sent numerous examples of L. peregra 

 var. orafa, a small example of the type, and several specimens of 

 A ncylus fluviatilis. 



52. PlSIDIUM NITIDUM AN ADDITIONAL SPECIES FOR EASTER- 

 NESS. From Loch Morlich, which is situate at an elevation of 1046 

 feet among the Cairngorm Mountains, Inverness-shire, we have 

 received from Mr. Knight a few r examples of this bivalve, which is 

 an addition to the vice-comital list for Easterness. Other shells sent 

 from the district include a single valve of Unio margaritifer from the 

 river Spey, and numerous examples of Limncza peregra var. ovata 

 from Nethy Bridge, Speyside. 



53. ANCYLUS FLUVIATILIS AN ADDITION TO THE LIST FOR 

 WESTERNESS. Several specimens of the freshwater limpet collected 

 in the Righ Water, Onich, on Loch Linnhe, were sent by Mr. 

 Knight, and add the species to the vice-comital list. Other species 

 sent from Onich include a specimen of Cochlicopa lubrica, and 

 numerous very small ones of Clausilia perversa. 



