Baker—Molluscan Fauna of Tomahawk Lake, Wisconsin . 21fi 
Station XVIII. (Figures 11, 12.) 
Woods on Quynoqk Point. This piece of woodland is a part 
of the Wisconsin forest reservation and is nearly all virgin for¬ 
est, with the vast accumulation of debris characteristic of such 
a region. Among the forest trees are white pine, spruce, hem¬ 
lock, white cedar, birch and poplar. The curious ground pine 
(Lycopodium ohscurum) is also common. The ground is cov¬ 
ered with moss and the trees with lichens. Rotten logs are scat¬ 
tered over the ground in endless profusion affording excellent 
concealment for the smaller helices. Curiously enough, no 
shells were found in birch logs, but were plentiful in pine and 
poplar logs. Mollusks were numerous in individuals but few 
in species. 
MOLLUSCA COLLECTED. 
Zonitoides arboreus. 
Pyramidula cronkhitei catskillensis. 
Stro bilops virgo. 
Station XIX. (Figure 13.) 
Virgin woods near logging camp Xo. 7, known locally as the 
cyclone woods. The character of this habitat is the same as that 
of the Quynock Point station. The trees are also the same, with 
the addition of oak, maple and balsam fir. 
MOLLUSCA COLLECTED. 
Zonitoides arboreus. 
Strobilops virgo. 
Pyramidula cronkhitei catskillensis. 
Helicodiscus parallelus. 
Station XX. 
Wisconsin River, four miles northeast of Sanders’ Resort. 
The river meanders here considerably, the curves being long and 
sweeping. The river bottom is sandy mud. The flood plain 
