Occasional Papers of the Museum of Zoology 21 



trees deer-mice, red-backed voles, and jumping mice (Zapus) 

 were taken. Signs of snowshoe hare were seen. 



Young Iiardzvood forest stage: On the eastern slope of a 

 low ridge at Birch Point, Cisco Lake, a young hardwood forest 

 is rapidly replacing a former growth of paper birches which 

 has followed a fire. In this growth numerous old paper 

 birches still persist, but they are being strongly crowded by a 

 thick growth of vigorous young sugar maples, some of which 

 have trunk diameters up to about eight inches, and which 

 form a dense shade. Among the maples are numerovis young 

 firs and a few^ young hemlocks and arbor-vitae. The ground 

 is mostly bare, being scantily covered by leaves. The soil is 

 moist, but there is no grass and little brush. In this habitat 

 deer-mice were taken, and one red squirrel was seen. 



Artificial Conditions 



Overflozv swamp habitat: Due to the rise in water-level 

 of the lakes of the Cisco Lake chain many low areas of forest 

 have been flooded and killed. Many of the dead trunks of 

 these trees still remain standing, mixed with fallen and decay- 

 ing logs in the water. Locally these habitats are called "over- 

 flow^ swamps," a name here adopted for the habitat. There 

 is little living vegetation in these swamps, an occasional water 

 lily being almost the only plant present. Porcupines commonly 

 walk out on the logs of the swamp to secure the water lily 

 leaves, and probably the mink occasionally runs over the logs 

 in its movements along the waterways. 



Cultivated-field habitat: Cleared fields occur only sparingly 

 in the regions visited, and these fields are small in size. No 

 study of their inhabitants was made, though silver-haired bats 

 were collected while they were flying over a small clearing in 

 the Little Girl's Point Region. 



