455 
STATION V. 
The wooded area. The ground beneath the trees is covered 
with leaves, dead twigs, old logs and other wood debris, which af- 
ford cover for the following species of land shells: 
Succinea ovalis optima. Plentiful. 
Succinea avara. Plentiful. 
Zonitoides arboreus. Common. 
Vitrea hammonis. Rare. 
Polygyra fraterna. Very common. 
Polygyra albolabris. Rare. 
Polygyra thyroides. Very common. 
Pyramidula alternata. Common. 
The larger Polygyras appear to frequent the base of large trees, 
while the smaller species are common under ‘the forest debris and 
leaves. Succinea ovalts is plentiful under old leaves. Pyramidula 
alternata and Polygyra fraterna prefer to hide under “started’’ 
bark on dead stumps and logs, in company with the large beetle 
Osmoderma scabra. Of twenty-one specimens of Polygyra thyroides, 
five individuals had a pronounced denticle on the parietal wall. 
The specimens of Succinea ovalis optima vary greatly in the height 
of the spire and in the width of the last whorl. 
ANIMALS ASSOCIATED WITH THE MOLLUSCA. 
INSECTS. 
Osmoderma scabra. Beetle; under bark. 
Melanotus communis. Beetle; under bark. 
CRUSTACEA. 
Cambarus blandingi acutus. Crawfish. 
LOWER VERTEBRATES. 
Eutenza sirtalis. Garter-snake. 
Storeria occipitomaculata. Storer’s Snake. 
BIRDS. 
Red-headed Woodpecker. 
Northern Flicker. 
Chimney Swift. 
Blue Jay. 
Crow. 
