70 JOURNAL OF CONCHOLOGY, VOL. 13, NO, 3, JULY, I9I0. 



Arion ater (L.).— Passim. 



var. rubra Baudon. — Heereiiveen, 



var. succinea Miill. — Heerenveen. 



var. castanea Dum. & Moit. — Heerenveen. 

 Zonitoides nitidus (Miill.). -Heerenveen. 

 Hyalinia crystallina (Miill.). — Heerenveen. 

 Euconulus fulvus (Miill).— Heerenveen. 



var. alderi Gray. — Heerenveen. 

 Pyramidula rotundata (Miill.). — Heerenveen. 

 Helix nemoralis L. — 



var. rubella Moq. — Heerenveen. 

 Helicigona arbustorum (L.). — Heerenveen. 



var. undulata Sikes. — Heerenveen. 

 HygTomia hispida (L.). — Heerenveen. 

 Cochlicopa lubrica (Miill.). — Heerenveen. 



var. fusca Moq. — -Heerenveen. 

 Succinea putris (L.).— Passim. 



var. charpyi Baud.— Heerenveen. 

 Succinea eiegans Rissc— 



var. berilloni Baudon. — Heerenveen. 

 Succinea oblonga Drap.— Heerenveen. 

 Carychium minimum (Mull.). — Heerenveen. 

 Limnsea stagnalis (L.).— Passim. 



var. vulgaris West. — Sneek. 

 Limnaea palustris (Miill.).— Passim. 



var. tincta Jeffreys. — Heerenveen and Sneek. 



var. maritima Clessin. — Sloten. 

 Limnsea pereger (Miill.).— Passim. 



var. inflata Kobelt. — Heerenveen. 



var. acronica Studer. — Heerenven. 



var. lacustrina Clessin. — Sloten. 

 Limnsea auricularia (L.).— Heerenveen. 



var. acuta Jeffreys. — Heerenveen and Sloten. 



var. reflexa Nelson. — Heerenveen. 

 Physa fontinalis (L.).— Passim. 

 Planorbis corneus (L.).— Passim. 



var. anthracia Bourg. — Sneek. 

 Planorbis albus Miill.— Heerenveen. 

 Planorbis carinatus Miill. 



var. disciformis Jeff. — 

 Planorbis umbilicatus Miill.— Passim. 



var. major Pascal. — Heerenveen. 

 Planorbis vortex (L.).— Passim. 

 Planorbis contortus (L.).— Sneek. 



