FIBER. V>63 



Geogr. Distr. Unknown. 



Genl. Char. Size small; color paler than F. zibethicus. Skull 

 narrow; nasals short, rounded at posterior end; incisors heavy, molars 

 Ught. 



Color. Above light brown; belly buff brown; throat gray with a 

 dusky stripe on the chin ; white spot over each nostril. 



Measurements. Total length, 470; tail vertebrae, 202; hind foot, 

 67. Skull: basal length, 55; length of nasals, 18; zygomatic width, 

 35 ; mastoid breadth, 25 ; alveolar length of upper molar series, 15. 



b. Fiber zibethicus pallidus Meams. 



Fiber zibethicus pallidus Meams, Bull. Am. Mus. Nat. Hist. N. Y., 



1890, p. 280. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 



1 90 1, p. 213. Zool. Ser. Id. Mamm. Middle Amer. & W. 



Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 308, fig. 55. Zool. Ser, 



Pale Musk Rat. 



Type locality. Fort Verde, Yavapai County, Arizona. 

 Geogr. Distr. Lower California and State of Sonora, Mexico, 

 north to Montana. 



c. Fiber zibethicus rivalicius Bangs. 



Fiber zibethicus rivalicius Bangs, Proc. Bost. Soc. Nat. Hist., 

 1895, P- 541- Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1 901, p. 213. Zool. Ser. 

 Related Musk Rat. 



Type locality. Burbridge, Plaquemines Parish, Louisiana. 

 Geogr. Distr. Lower Mississippi region and swampy coasts of 

 Louisiana and Alabama. 



d. Fiber zibethicus aquilonius Bangs. 



Fiber zibethicus aquilonius Bangs, Proc. N. Engl. Zool. Club, i, 

 1899, p. II. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 T901, p. 213. Zool. Ser. 

 Northern Musk Rat. • 



Type locality. Rigoulette. Hamilton Inlet, Labrador. 



Geogr. Distr. Labrador, Range unknown. 



e. Fiber zibethicus hiidsonius Preble. 



Fiber zibethicus hudsonius Preble, N. Am. Faun., No. 22, 1902, 



P- 53- 

 Hudson Bay Musk Rat. 



Type locality. Fort Churchill, Keewatin, Canada. 



Geogr. Distr. Keewatin, Canada. Range unknown. 



Genl. Char. Size small. Skull with high interorbital crest; mo- 

 lars small. 



