8S JOURNAL OF CONCHOLOGY, VOL. 9, NO. 3, JULY, 1S98. 



Var. curta. — With ihe type. 



Vertigo antivertigo. — Plentiful at the roots of Iris pseudacorus 

 in the snipe-bog. Two specimens on the same plant in a coppice 

 near Rhos Goch station. 



V. pygmaea. — A few with P. anglica on the cliffs. Common in 

 the snipe-bog. 



V. substriata.. — One in limestone quarry, near Llanbadrig 

 Church. Several in the snipe-bog. 



V. edentula. — Several in limestone quarry, near Llanbadrig 

 Church. One in the snipe-bog. 



Clausilia perversa.— One on the cliffs. 



Cochlicopa lubrica. — Fairly common. 



Var. lubricoides — One or two with the type. 



Succinea elegains. — Plentiful. On the cliffs ; in ditches and the 

 snipe-bog ; in a coppice near Rhos Goch station. 



Carychium minimum. — Plentiful in the same localities as the 

 last species. 



Planorbis albus. — On Potamogeton in Llynfelinant. 



P. spirorbis. — In a ditch near the village with B. hypnorum and 

 P. pus ilium.. 



P. umbilicatus. — Plentiful in ponds and ditches. 



P. COntortus. — .One specimen in the snipe-bog. 



Bullinus hypnorum. — Plentiful in ditches and the snipe-bog. 



Physa fontinalis — Ditch near Camlyn Bay. 



Limnaea peregra — Plentiful. 



L. auricularia var. acuta.— Ditch near Camlyn Bay. 



L. palustris. — Plentiful in ditches and the snipe-bog. In a 

 coppice near Rhos Goch station. 



L. truncatula. — Plentiful in ditches. 

 Var. minor. — In a wet place on the cliffs. 



Ancylus fluviatilis. — Stream near Camlyn Bay. 



Valvata piscinalis. — Plentiful in ponds and ditches. 



V. cristata. — Plentiful on Lemna in a ditch near Camlyn Bay. 



Sphasrium corneum. — Llynllygeirian. Sparingly in ditches 

 near Cemmaes. 



S. lacustre. — Pond by the road side near Llanflewin. 



Pisidium fontinale. — Plentiful in ponds, ditches, and the two 

 lakes. 



Var. pulchella. — Fine and plentiful in a shallow pond near the 

 village. 



P. pusillum. — Plentiful in the same localities as P. fontinale. 

 Large specimens in a damp place in a coppice near Rhos Goch station. 

 Var. obtusalis. — Fine ; in a ditch in the snipe-bog. 



