MUKID.E— ARVICOLIN^— CUNIGDLUS TORQUATUS. 



251 



Table LXL— Measurements of sixty-eight (and list of other) specimens of Cuniculus torquatl'S— Cont'd. 



' Contained 5 embryos (McFar'.ane). 



Genus FIBER, Cuvier. 



< Castor, Linn., Syst. Nat. i, 176(5, 78. 



< Mns, Gm., Syst. Nat. i, 1788, 125. 



X Myocastor, Kerh, " L. S. N. 1792 (type Myopotamus coypiis)." 

 = Fiber, Cuv., "Lepons, i, 1800 (type Castor zibethicus)." 



< Lemmus, Fischek, Syn. 1829, 289. 



= Ondatra, " Lacepede."— Less., Man. 1827, 286 (type Castor zibcthicus). 



Chars. — Largest of the family. Form arvicoline, but tail nearly as long 

 as body without head, compressed, nearly naked, reticulate. Hind feet set 

 obliquely; soles naked, quadri-tuberculate ; toes incompletely webbed. Fore 

 arm bristle-fringed. Muffle hairy, except the nasal pads. Ears small, with 



