MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 8 1 



surprisingly small, in fact not appreciable in comparing ten adults from Cum- 

 berland Co., N. J., with a like series from Cambria Co., Pa., all measured by 

 the same collector. 



Measurements. Total length, 168 mm. (6f6) ; tail vertebrae, 75 (2Jf ;) 

 hind foot, 21 (^f) ; height of ear from crown, 15 ( T 9 5-). 



Specimens examined. Pa., 50. N. J., 125. 



Fischer's Deer Mouse. Peromyscus leucopu* noveboracensis (Fischer). 



1829. \_Afus sylvaticus~\ noveboracensis Fischer, Synopsis Mammalium, 

 p. 318. 



1897. Peromyscus leucopus noveboracensis Miller, Proceedings Boston So- 

 ciety N. History, vol. 28, p. 22. 



lype locality. New York. 



Faunal distribution. Transition zones and lower border of Canadian ; 

 New England to ( ?) Minnesota. 



Distribution in Pa. and N. J. Abundant in the transition limits of both 

 states ; meeting Miller's deer mouse and the Cloudland deer mouse on the 

 confines of the primeval coniferous forests at a height of about 2000 feet, 

 losing its racial distinctions from Rafinesque's deer mouse at about 1000 feet 

 elevation. 



Records in Pa. and N.J. See under distribution. 



Habits, description of species, etc. See under preceding species of Pero- 

 myscus. 



Specimens examined. Pa., 138. N. J., 81. 



Genus Oryzomys Baird, Mammals of N. America, 1857, p. 458. 

 Northern Rice Rat or Marsh Rat. Oryzomys palustn's (Harlan). 



1837. Mus palustris Harlan, Silliman's Amer. Journal Science and Arts, 

 vol. 31, p. 386. 



1857. Oryzomys palustris Baird, Mammals of North America, p. 459. 



Type locality. " ' Fast Land,' in the vicinity of Salem," N. J. 



Faunal distribution. Brackish and salt water tide marshes of the lower 

 and middle austral zones ; Delaware Bay to Chesapeake Bay and Potomac 

 River. 



Distribution in Pa. and N. J. Not found in Pa. Recorded originally 

 from the marshes near Salem, N. J. Stated by trappers to be still found 

 there. Also reported to live in the marshes of Cohansey creek near Green- 

 wich, Cumberland Co., and recently rediscovered by Henry Warrington in 

 the salt marshes of Cedar creek near Cedarville. The author has searched 

 in vain for it at Salem, at the mouth of the Maurice River, at Tuckahoe and 



