1896.] 223 



LAND AND FRESHWATBR MOLLUSCA. 

 BY R. F. SCHARFF, PH.D. 



As one would expect from the abundance of wood, most 01 

 the species of Hyalinia are abundant in the Clonbrock 

 demesne, especially the otherwise rare Garlic Snail {Hyalinia 

 alliaria). When writing my paper on the Irish I^and and 

 Freshwater Mollusca {Irish Naturalist^ vol. i., 1892), I was 

 under the impression that the European range of this species 

 was much more restricted than it really is, having since taken 

 it on the BrUnig Pass in Switzerland (see NacJirichtsblatt d. d, 

 Malakol. Gesellsch. 1895). Another uncommon species which 

 is known only from three or four Irish localities is Hyaliiiia 

 Drapafnoiudi. The commonest species were H. nitidula^ H, 

 cellario.^ and H. crystalli7ia. Both H. ptira and H. radiatiila 

 were noticed under decaying leaves and twigs, and also /^ 

 fulva. 



As regards slugs, they were not so abundant, not even the 

 ubiquitous Agriolimax agrestis, whilst A. Icsvis was not to be 

 seen anywhere. The only really common slug was Limax 

 marginatus {arborum) which gracefully glided up and down 

 the dripping tree-trunks after the heavy showers we had. 

 Under leaves and dead wood were secured Arion ater (the 

 brown and blade forms), A. siibfuscus, A. horterisis (the bluish 

 variety), A. circuinscript7cs (BourguignatiJ, and A. intermedius 

 (ini7iimus), also Limax maxinius, but I was much surprised 

 not to meet with a single specimen of the keeled slugs — 

 belonging to the genus Amalia. 



I was delighted to meet with such a number of the rarer 

 Helices at Clonbrock. The stems of the stately Beech-trees 

 are tenanted by numerous H. fusca, one of the rarest species 

 of British Helices, and which in other localities I had only 

 observed among the leaves of Liizula sylvatica. Other rare 

 species found among leaves on the ground were Helix 

 laniellata, H. acicleata, and H pygmcza, whilst H. ritpestris 

 occurred among the crevices of old limestone walls. 

 McWeeneywas fortunate in discovering a scalariform monstro- 

 sity o^ Helix roticndata among the small fungi he was examin- 

 ing. I had never seen such a form before, and quickly trans- 

 ferred it to m}^ collection. H. rufescefis, our commonest 



