238 Mr. O. Thomas on some 



uniform dark brown. Tail shorter than in the Espiritu 

 Santo hispidiiSy blackish brown throughout. 



Skull like that of 0. hispidus, with the curious exception 

 that the anterior zygoma-root, which in hispidus has the 

 typical Oxymycteriis character of being very narrow, with a 

 slanting and slightly curved — almost straight — front edge, 

 has here a distinctly curved edge, so that its outline is more 

 as in ordinary Cricetincs, or at least as in Lenoxxis '^^ . 



Dimensions of the type (measured in the flesh) : — 



Head and body 160 mm.; tail 100; hind foot 30; ear 21. 



Skull : length of nasals 14 ; palatilar length 14 ; upper 

 tooth-row 5'6. 



Skull of another specimen : greatest length 36*3; condylo- 

 basal length 33; zygomatic breadth 17; nasals 13'8x4*4; 

 interorbital breadth 7T ; breadth of brain-case 15'3; pala- 

 tilar length 14*4; palatal foramina 8*1; length of upper 

 molar series 5*6. 



Hah. Sao Louren^o, near Pernambuco. Alt. 30 m. 



Tijpe. Adult male. B.M. no. 3. 10. 1. 56. Original 

 number 1706. Collected 14th August, 1903, by A. Kobert. 

 Presented by Oldfield Thomas. Five specimens. 



Except for its rather shorter tail, this Oxymycterus does 

 not appear to differ externally from 0. hispidus, but in the 

 characters of its zygoma-root it forms an exception to all the 

 members of the genus, more resembling Lenoxus, to which, 

 however, its general appearance and long fore claws show 

 that it has no real relationship. 



Oxymycterus judex, sp. n. 



A large dark rufous species, with large brain-case. 



Size largest of the S. -Brazilian species. General colour, 

 in a spirit-specimen, dark coppery rufous, the back blacker, 

 the sides more rufous, the belly dull tawny rufous. Ears, 

 hands, feet, and tail dark brown, without rufous tinge. 

 Claws particularly long and powerful. Hind feet large and 

 heavy, the fifth sole-pad small and inconspicuous, the sixth 

 very large. 



Skull large and heavy, with large brain-case, this being 

 conspicuously larger in proportion to the muzzle than it is in 

 the Parana 0. qucestor. Thus the brain-case, measured from 

 autero-external to postero-external corner, is 15"7 mm. in 

 length, while it is only 14*5 in 0. qucestor, whose muzzle is 



* Not so strongly curved as in the Lenoxxis apicalis figured by Allen, 

 but quite as in a rather younger examjile in the British Museum 

 collection. 



