ROEBUCK : ON DENBIGHSHIRE MOLLUSCA. 209 



Sphaerium lacustre. In a pond at the foot of Deganwy 

 Hill, 1877 ; common in a pond in Abbey-road, near 

 LlandudnO; in company with Lwincea peregra and PJiysa 

 hypjtorum. 



Physa hypnorum. Pond in Abbey-road, near Llandudno, 

 plentiful. 



Limnaea peregra. Common in ponds and roadside puddles 

 (with Succinea putiis) on the flat lands between the two 

 Orme's Heads, and at Eglwys Rhos ; also in a new water 

 trough on the summit of the Great Orme's Head (300 ft.), 

 and in ponds at the foot of Deganwy Hill. 



Arion ater. Very abundant ; Bodscallan, Llangwystenin, &c. 



A. ater var. rufa. One in a boggy pasture at Bodscallan, of 

 a light brown colour, with head black and and the margin 

 of the foot yellow with the transverse streaks brown. 



A. hortensis. A few specimens in Bodscallan and Gloddaeth 



woods, and at Llandrillo-yn-Rhos. 

 Limax arborum. Abundant in the beech woods by the 



roadsides two miles north of Llanrwst. 



L. maximus var. cellaria. A few at Tal-y-Cafn, and one at 



Llangwystenin. 

 L. agrestis. Common ; Little Orme's Head, Llangwystenin, 



Llandrillo, Tal-y-Cafn, Bodscallan, Eglwys Rhos, &c. 



Succinea putris. A few in Gloddaeth woods, by stream- 

 sides, and plenty in a wet pasture near Bodscallan. 



S. elegans. Common in wet places by the roadsides between 

 Llandudno and Eglwys Rhos. 



Zonites cellarius. Common in many places; Gloddaeth 

 woods, summit of Little Orme's Head, Bodscallan, Llan- 

 gwystenin, Llandrillo-yu-Rhos, Tal-y-Cafn, and Llanrwst. 



Z. alliarius. In several places; summits of the Great and 

 Little Orme's Heads, and of Gloddaeth mountain, also at 



p 



