Mammals from Ceard, NJ'J. Brazil. 501 



6. RhipiJomrjs cearanus^ sp. ii. 



? . 50. Sena do Ibinpaha. 



Very like the Guiannii li. nitela, Tlios., af^reeing with it 

 ill size, the general dull fawn-colour, and white belly, but 

 the hands are wholly brown above, and the feet are also 

 coniph'ti'ly brown, except a narrow light line along the 

 hallucal border and on the tips of the toes. Tail less heavily 

 haired than in nitela^ scarcely tufted at all. 



Skull with the njcsopterygoid fossa narrow, parallel-sided, 

 not broaileni'd anteriorly, ])enetrating the palate as far as the 

 level of the front of m^ ; pnrapterygoid fossm flat, their outer 

 border not raised, ami their lloor not excavated as is the case 

 in R. nitela. jMoiar series rather longer thaii in nitela. 



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



Head and body 101 mm.; tail 128, hind foot 26; 

 eas 18. 



Skull : greatest length 20*5; basilar length 22*5; nasals 

 9'() ; interorbital breadth •1*8 ; breadth of brain-ease 13 6; 

 palatilar length 11"4; palatal foramina 6'ox2'7; upj)er 

 molar series -I'D. 



'J'l/pe. Young adult female. Original number 50. Col- 

 lected 8th February, 1910. 



This lihipidviuijs is readily distinguished from li. nitela 

 by its darker fei-t and the different structure of its posterior 

 narial region. No other species seems to be nearly related 

 to it. 



" Taken in a house.'' — E. S. 



7. Ortjzomys suhjlavns^ Wagn. 



cJ. 4 ; ?. 21. Ipu. 



^. 4.'), 48, 51; ?. 39,52, 57, 7G, 77, 79. Serra de 

 lbi:ipaba. 



*' Kato vermelho."— £•. S. 



8. Ori/zflt/iT/s sp. 



? . 19. Ipu. 

 O. I'liuniti gioup. 



9. ZytjoJontontiis lasinrus, Lund. 



J. 15. Ipu. 



<J . 25, 29, 32, 35, 30, 38 ; ? . 27, 28, 33, 34, 37. Scrra 

 de Ibiapaba. 



"Native name ' Pishiina.' Very common in the maize- 

 iiehls."— is', 'b. 



