Occasional Papers of the Museum of Zoology 1 1 



Cottontails were noted a few times in blackberry thickets, in 

 brush in ravines, in clearings along the river, and in beech-maple- 

 oak forest along ravines. 



Cleared-ravine sedge habitat: 



Blarina brevicauda talpoides. Short-tailed shrew, i. 



Peroniyscns leucopus noveboraccnsis. Northern white-footed mouse. 3. 



Microtus pennsylvaniciis pcnnsylvanicns . Pennsylvania vole. 5. 



A large ravine south of the river had been cleared of trees 

 evidently several years previously, and it has now grown up 

 mostly to sedges, grass, and iris in its more moist parts. Along 

 the little brook which flows through the ravine there is a fringe 

 of willows, and among the sedges a number of shrubs and small 

 trees occur, mostly thorns and a few young sycamores and black 

 walnuts. 



Fifty mouse traps set in this habitat took on the first day, 

 August 16, three northern white-footed mice and three Penn- 

 sylvania voles. More voles and a short-tailed shrew were taken 

 on later days. 



Clear ed-upland rush habitat: 



Mephitis nigra. Eastern skunk. Den. 



Peromyscus maniculalus bairdii. Prairie white-footed mouse, i. 

 Synaptomys cooperi. Cooper lemming- vole. i. 

 Microtus pcnnsylvanicns pcnnsylvanicns. Pennsylvania vole. 7. 

 Microtns ochrogaster. Prairie vole, i . 



Citcllns tridecemlineatus tridecemlineatus. Thirteen-striped ground 

 squirrel. 2. 



In the shallow, poorly drained depressions of the cleared 

 upland the vegetation is dominated by rushes, which grow in 

 clumps and form a thick growth, reaching a height of about 

 one meter as a maximum. At the edges of the habitat and in 

 places not thickly covered by the rushes a growth of sedges, grasses, 

 and moss covers the ground; but under the thickest growth of 

 rushes the ground is bare and is evidently covered by water 

 during a part of the year. On this upland one small pond sur- 

 rounded by rushes did not dry up until late in August. In a 



