122 Copeland and Church Mammals of Grand Manan. 



nicus. As the validity of this subspecies is somewhat questioned, and rests 

 principally on size, the following table of measurements may be of interest. 

 Both body and cranial measurements of the Grand Manan specimens are 

 strikingly close to those of gymnicus from the mainland. 



AVERAGE MEASUREMENTS OF ADULT Sciurus hudsonicus gymnicus. 



SKULLS. 



Peromyscus canadensis argentatus subsp. nov. 



GRAND MANAN WHITE-FOOTED MOUSE. 



Type from Grand Harbor, Grand Manan, New Brunswick. Adult d\ 

 No. 168, coll. of Manton Copeland, Taunton, Mass. Collected September 19, 

 1905, by Morton L. Church and Manton Copeland. 



Distribution. Island of Grand Manan, New Brunswick. 



Characters. Resembles most closely Peromyscus canadensis abietorum, but 

 differs decidedly and constantly, and is easily distinguishable. The color 

 of upper parts is close to slate-gray, and lacks almost completely the dull 

 russet of abietorum; dark patch in front of eye pronounced. 



Measurements of body and skull average somewhat greater than those of 

 abietorum. 



Color. Type : Upper parts slate-gray due to the presence of black-tipped 

 and gray-tipped hairs; mid-dorsal line slightly darker; a few russet-tipped 

 hairs, most abundant on sides and at base of tail ; dark patch in front of 

 eye more prominent than in abietorum; underparts white, hairs plumbeous 

 at base ; hands and feet white ; tail sharply bicolor, black dorsally, white 

 ventrally. 



* Bangs, O., Proc. Biol. Soc. Wash., X, p. 160, Dec. 28, 1906. 

 f Allen, J. A., Bull. Amer. Mus. Nat. Hist., X, pp. 255-256, July 22, 1898. 

 J Bangs, O., Proc. New Eng. ZoOl. Club, I, pp. 27-29, March 31, 1899. 

 I Thomas, O., Proc. Biol. Soc. Wash., XVIII, pp. 191-196, Sept. 2, 1905. 

 || Allen, J. A., Mon. N. Amer. Rod., p. 688, 1877. 



