164 Proceedings of the Royal Physical Society. 



" Everywhere from Aberdeenshire to the Channel Isles." I got this 

 at Reiss, fine, under similar circumstances that Mr Jeffreys did at Swan- 

 sea, — " in an old quarry into which no stream flows." 



Avion ater, in many localities. 



A. hortensis, a pest especially in gardens. 



Limacc Jlavus, several places. 



L. agrestis, another pest in fields, &c. I got also a very dark one, 

 hitherto considered a variety of the above, now L. parvulus of Normand, 

 a French conchologist. 



* Succinea elegans, in several places, but far from common. 



Vitrina pellucida, in many localities. 



Zonites cellarius, as the above. 



Z. alliarius, generally diffused, has a strong garlic-like smell. 

 Z. nitidulus, Wick, rare; Jeffrey's range, ''Moray Firth district to 

 Guernsey." 



Z. crystallinus, Whaligo, Wick, and Freswick ; Jeffrey's range as 

 above. 



Helix nemoralis, variety hortensis. In several localities, generally 

 on the sea-coast. 



Helix arbustorum, same localities. 



H. ericitorum. On sandbanks between Castlehill and Murkle, and 

 on the Links at Reay. Jeffreys says, " Apparently not ranging farther 

 north than the Hebrides." 



Helix rotundata, several places. 



Pupa umbilicata, as the above. 



Clausilia rugosa, in the cliffs on the sea-coast, near Girnigo Castle, 

 Southhead Wick, and old limekiln near Hemprigs. 

 Cochlicopa lubrica, in several places. 



So far the list for Caithness. I am, however, desirous of 

 adding two shells found by me in Sutherlandshire, believing 

 they are of sufficient interest to be noticed here. 



Helix rupestris, on limestone rocks at Durness, in August 1857- 

 Rare. Fleming mentions it as a Scottish species. 



Bulimus acutus, sandhills at Auldshore Beg, near Cape Wrath, July 

 1861, and at Durness, August 1857, associated with Helix ericetorum. 

 It is strange not to find the B. acutus with the latter shell in Caithness. 

 Dr Gordon says — " Collected in Caithness, and found in rather a suspicious 

 locality — on a mantelpiece." 



It is the only authority he has for including it in his list ; 

 he however says, " It is not without some hesitation that 

 this pretty species is here included," a caution I fully agree 

 with, having sought for it attentively, and so far in vain. 



