Baker—Molluscan Fauna of Tomahawk Lake, Wisconsin. 203 
less reveal many interesting species not hitherto reported from 
Wisconsin. 
Headquarters were established at Sanders’ Resort on the north 
shore of the eastern arm of the lake and from this base all field 
operations were conducted. The Wisconsin River stations are 
mostly on land owned by Mr. Charles Sanders. 
DISCUSSION OF BIOTA BY STATIONS 
Station I. (Figure 2.) 
Well-wooded area on high bluff above Sanders’ Resort. The 
timber is second growth, following the cutting of the original 
coniferous forest, and consists principally of birch, maple, pop¬ 
lar and oak. The ground beneath this forest growth is thickly 
covered with rotting logs and bark, dead leaves and a thick carpet 
of vegetable mold. The hill slopes at a sharp angle, providing 
excellent drainage. Although there had been a prolonged 
drought the ground was moist under the leaves and large logs, 
showing that a well wooded tract of country holds the moisture, 
allowing it to seep through the soil and provide more or less per¬ 
manent springs. These incipient forests were always dark and 
damp. . 
The small mollusks, as well as a number of beetles, were very 
abundant in this section, hiding under started bark, in crevices^, 
under rotting logs and in any other place of concealment. 
MOLLUSCA COLLECTED. 
Zonitoides arboreus, very common. 
Euconulus fulv-uSj rare. 
Pyramidula cronkhitei catskillensis, commcn. 
Pyramidida aliernata, rare. 
Helicodiscus parallelus , common. 
Polygyra albolahris, very rare. 
Strohilops virgo, common. 
