Stelfox — List of Land and Freshwater Molhisks of Ireland. 83 



A beautiful bright golden-yellow form 

 with brilliant orange foot-sole was re- 

 cently taken by Mr. Welch and myself 

 on Brandon mountain in South Kerry, 

 the most highly colotu'ed specimen being 

 taken at an altitude of about 2700 feet. 

 On Croaghpatrick, West Mayo, a similar 

 yellow form has occurred to me at an 

 altitude of 1525 feet. 



Arion hortensis Ferussac. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NG LF WH ME 

 SG KG KD DU 

 CL NT QC CW Wl 

 NK LK ST KK WX 

 SK MC EC WA 

 WC 



Generally distributed, but much more 

 plentiful in the east ; it is often rare 

 and local in the west. On the Dingle 

 peninsula it is exceptionally rare; and 

 on the islands ofE the west coast it is not 

 always to be found. The western form 

 of Arion mtermedius closely resembles 

 pale specimens of this slug, and, during 

 moist weather, when the serrated out- 

 line of that species is not always visible, 

 there is little externally to separate the 

 species, except the mucus, which in this 

 species is more tenacious.' 



' It may be worlh noting that in the 



districts where tlie grey foim oiA. intermedins 

 occurs, this slug is generally almost black, with 

 dark orange footsole, thus making the separation 

 of the l\\ o species a comparatively easy task. 



Arion circumscriptus Johnstou.- 



Arion hourguignati, SeharfE, Slugs of 

 Ireland, Sci. Trans. Eoyal Dublin 

 Society (2), iv, 547, 1891. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NG LF WH ME 

 SG KG KD DU 

 CL NT QC CW Wl 

 NK LK ST KK WX 

 SK MC EC WA 

 WC 



Widely distributed, but never as 

 plentiful as the other species of the 

 genus. More common in the west than 

 Arion hortensis. It inhabits the majority 

 of the western islands, where a greyish- 

 brown form prevails. This " western " 

 form, which also occurs in the Dublin 

 and Wicklow hills, is similar to one I 

 have collected in the Orkneys and 

 in western Norway. 



Geomalacus maculosus Allmau. 



The "Kerry Slug" may be collected 

 in large numbers during damp weather 

 on lichen-covered rocks in some portions 

 of West Cork and South Kerry, on 

 which its protective markings render it 

 scarcely visible. It has also been taken 

 in woods by Dr. Scharlf, who discovered 

 it near Glen garrrffi in the mossy forks of 

 trees, where it had retired during dry 



-The i\3.'me A. circumscriptus of Johnston is 

 adopted here, because the older .d. fnscintui, 

 which was thought to he. this species, is pro- 

 babiv Ariott iiitcrmedius Xormand . 



