242 Wisconsin Academy of Sciences, Arts and Letters. 
Genus Pyramidula Fitzinger. 
Subgenus Patula Held. 
48. Pyramidula cronkhitei catskillensis (Pilsbry). 
Stations I, XVIII, XIX. Common associated with the 
two above mentioned species. Xone of the typical form 
were seem, all being good examples of catskillensis. 
49. Pyramidula alternata (Say). 
Station I. A few specimens of this common land snail 
were collected in the young deciduous forest near Sanders’ 
Resort. They were found on the under side of decaying 
logs. 
Family Zonitidae. 
Genus Vitrea Fitzinger. 
50. Vitrea hammonis (Strom). 
Station XXI. A single specimen was found on the edge 
of a muddy pool. 
Genus Euconulus Reinhardt. 
51. Euconulus fulvus (Muller). 
Station I. Common, associated with Strobilops and 
Helicodiscus. 
Genus Zonitoides Lehmann. 
52. Zonitoides arboreus (Say). 
Stations I, XVIII, XIX. This is by far the com¬ 
monest land snail in this region and is associated with 
Strobilops , Pyramidula cronkhitei catskillensis, Eucon¬ 
ulus and Helicodiscus. 
