186 MOLLUSCA OF IRELAND. [CH. IV 



" Blues " known to entomologists as Lyccvna ar/estis ; the 

 variety being termed L. artaxerxes ; it occurs upon 

 Arthur's Seat and upon some of the other Scottish hills. 



No less than 87 moths are given in Mr Wallace's 

 list as peculiar to Great Britain. Of these of course the 

 larger portion are " Microlepidoptera," and frequently 

 minute forms, which might be easily overlooked were they 

 really to occur also on the Continent. Though there are 

 these 87 moths they do not all of them rank as species. 

 However 61 are considered to merit specific distinction. 

 This number is, according to the late Mr Stainton, to be 

 further reduced to 50 undoubtedly distinct species since 

 some of the reputed species are rather local forms than 

 definable species. Of the beetles Mr Wallace's list shows 

 72 species and varieties confined to the British islands; 

 the list of insects concludes with the mention of three 

 Trichoptera, all apparently good species, which are not 

 found out of the British isles. 



The land and fresh water Mollusca present us with a 

 few peculiar forms ; a black slug spotted with yellow, 

 Geomalacus maculosus, was discovered on the shores of 

 lake Carogh in Kerry in the year 1842, and has not been 

 met with elsewhere since that year. A small pond snail, 

 Lymncva involuta, is confined to a small Alpine lake near 

 Killarney ; finally there are two small shells which are 

 ranked as species, one a bivalve, the other an univalve, 

 besides 79 varieties. 



The Rev H. Friend reports 1 the presence of a species 

 of Lumbricus (L. papillosas) in Ireland, which has not yet 



1 Irish Naturalist, Feb. 1894. 



