new Forms of Sclums, Oxjmyctems, (Lc. 489 



Oxymycterus delator^ sp. n. 



A laro;e species of a uniformly blackish colour. 



Size fairly large. Fur close and straight ; hairs of back 

 about 10 millim.' in length, their ends with a slight metallic 

 sheen. General colour of whole upper surface very dark, 

 darker than in any other species of the genus, nearly approxi- 

 mating to Eidgway's " clove -brown," not rufous at all. 

 This is when viewed from behind and above, but if the 

 specimen is held between the light and the observer, with its 

 nose towards him, its upper surface appears blackish with a 

 purplish sheen. Sides scarcely lighter than back. Under 

 surface dull cream-buff with the slaly bases of the hairs 

 showing through. Head like back, a small lighter patch 

 behind and above each eye. Lips and chin dull soiled buffy. 

 Ears small, well-haired, blackish. Arms and legs smoky 

 grey; hands and feet dark brown with some shining ligditer 

 hairs on the metapodials. Tail thickly and uniformly haired, 

 black above, rather lighter below. 



Skull not specially developed in the muzzle, narrow and 

 elongated, the brain-case being unusually narrow, high, and 

 rounded in section ; zygomata but little expanded. Palatal 

 foramina ending opposite the first third of m^ ; posterior nares 

 slightly behind the back of nv". 



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



Head and body 155 millim.; tail 106; hind foot, s. u. 26, 

 c. u. 28-5; ear 17. 



Skull : greatest length 34*5 ; basilar length 28 ; zygomatic 

 breadth 14; nasals 12"lx3"5; interorbital breadth 5"1 ; 

 brain-case breadth 13-4 ; palate length 13-4 ; diastema 8-5 ; 

 palatal foramina 7'1 X 2"9 ; length of upper molar series 5. 



Hob. Sapucay, Paraguay. 



Tyi:)e. Adult male. Original number 880. Collected 

 24th October, 1902, by Mr. WiUiam Foster. 



This very remarkable Oxymycterus is readily distinguish- 

 able from all its allies by its uniformly dark colour, in which 

 respect it is only approached by the otherwise widely different 

 O.juliacce, Allen. 



Kannabateomys amhlyonyx imllidior^ subsp. n. 



General characters as in K. amhlyonyx^ but colour paler 

 throughout, the belly being almost white. 



Size as in K. amlilyonyx. General body-colour dull buffy 

 yellowish, not dissimilar to that of young examples of the 

 type form, but very different from the strong ochraceous of 

 adults. Head grizzled grey and black, without yellowish 

 suffusion ; ear-tufts grey ; light patches behind ears yellowish 



