MAMMALS OF PENNSYLVANU AND NEW JERSEY. 223 



formed in small squarish spots ; eyelids white ; lower head, neck, thighs and 

 rump pure gray, whiter on belly. Tail grayish with blackish border tipped 

 with white ; vertebrae about J^ length of head and body ; hairs long, giving 

 a bushy appearance as in a shortened red squirrel's tail. Body fur harsh and 

 stiff. Ears small and short.* 



Measurements. — Total length, 15 inches; tail vertebrae %% in.; hind foot, 

 2 in. 



Canadian Beaver. Castor canadensis Kuhl. 



The instances of wild beavers in Pa. and N. J., which are the existing de- 

 scendants of animals escaped from private parks and game preserves and 

 imported from other parts of the United States and Canada, are given in the 

 preceding article on this species. 



Eastern Prairie Cottontail ; Rabbit. Lepus floridanus mearnsi 

 (Allen). 



It is probable, as implied by Miller and Bangs (see Proc. Boston Soc. N. 

 History, 1895, p. 410), that this species has entered its present habitat in the 

 mountainous parts of Pa. and N. York since the transformation of the faunal 

 conditions of those states by deforesting. If this be true, there is a probabil- 

 ity that this race was not found in Pa. in aboriginal times, unless there always 

 was a strip of normally open country on the southern shores of Lake Erie. 

 See previous remarks under this species. 



? Western Timber Wolf. Canis mexicanus Linn, (subsp. ?) 



It is a fair and open question whether the " native wolves,'' which are stated 

 to yet linger in the wilds of western Pa., even if eventually proved to exist 

 there, are not from stock escaped from shows or other forms of captivity or 

 purposely imported and released in the days of the scalp acts of 1885, etc. 

 On this account I have placed the species in this supplemental list. 



List of Species of Doubtful Occurrence in Pa. and N. J. 



Black Killer ; Square-Nosed Grampus. Pseudorca crassidens (Owen). 



Being found on the coasts of Tasmania, Peru, Denmark and (?) Davis 

 Strait, this rare species is considered as " pelagic " in its range. No record 



* Since the above writing, Mr. A. H. Jillson has sent me two fresh skins of this spermo- 

 phile, both adult females, stating, " They were killed on Oct. 10, 1902, at Tuckerton, N. J., 

 by a boy." His measurements of total length were 14^^ in. and 16% m, Mr. Bangs com- 

 pared them with western skins for me and says they match exactly specimens from Minne- 

 sota and are paler than Dakota skins. 



