268 Mr. O. Thomas on Mammals from 



1. Cebus apella, L. 



? . 29. E. Iriri (F. Lima). 



$ . 68, 69. Acajutuba, R. Negro (E. SnethJage — as are 

 all specimens not otherwise credited). 

 S . 114, 115. Villa Braga, R. Tapajoz. 



2. Pithecia pithecia, L. 



<J. 57, 61; ? . 58, 59, 60. Acajutuba, Rio Negro. 

 ? . 62, 63. Manacapurii, R. Solimoes. 



3. Pithecia monachus, Geoff. 



$ . 117 ; ? . 118. Villa Braga, Rio Tapajoz. 

 Villa Braga is on the left (western) bank of the Tapajoz, 

 just above the first rapids. 



1. Pithecia albinasa, Geoff. & Dev. 



? . 31. Rio Iriri, R. Xingii. 



The rediscovery of this well-defined species is of much 

 interest, for it seems never to have been obtained since its 

 original description in 1848, and the type-specimen in Paris 

 has hitherto remained unique. That type was obtained alive 

 from Indians at Santarem. 



Fraulein Snethlage's specimen was shot out of a small 

 troup on the banks of the river. 



5. Callicebus hojfmannsi, Thos. 



S . 119, 120, 121 ; ? . 122. Villa Braga, R. Tapajoz. 



Only previously known by the type, collected by W. 

 Hoffmanns at Urucurituba, Santarem. 



There is considerable variation in the colour of the under 

 surface, two of these specimens having this pale yellowish 

 like the type, while the other two have it strong ochraceous 

 buffy ; but the distribution of the buffy or yellowish is the 

 same in all. 



6. Callicebus remulus, Thos. 



$ . 112. Santarem. 



Obtained alive by Fraulein Snethlage at Santarem, the 

 original locality more or less doubtful. 



Not precisely like true remulus, but without a knowledge 

 of the exact locality it is impossible to be sure whether the 

 differences are individual or not. 



