SAIMIRI 313 



distance below the elbow, hands and feet tawny; head and tail like S. 

 sciureus. Ex type British Museum. 



Measurements. Size similar to S. sciureus. Skull : occipito-nasal 

 length, 64.5 ; zygomatic width, 43 ; intertemporal width, 32 ; median 

 length of nasals, 1 1 ; width of braincase, 36 ; height of braincase above 

 zygomata, 35 ; palatal length, 19 ; length of upper molar series, 13 ; 

 length of mandible, 40; length of lower molar series, 16; width of 

 palate between canines, 12; width of palate between last molars, 13. 

 Ex type British Museum. 



While the general color of this animal resembles that of S. 

 sciureus from the east coast of South America, it is at once noticeable 

 by its much darker forearms, hands and feet. But the great differences 

 between them are exhibited in the skull, and the large teeth of the 

 present species. The braincase has quite a different shape, being large 

 and narrow with an elevated forehead sloping rapidly downward to 

 the occiput where it is narrow and rounded. The palate is wider 

 throughout its length, while the teeth are much larger, the canines 

 being also stouter and broader. Several specimens were brought by 

 Mr. Buckley from the type locality and there are others in the British 

 Museum Collection from the Jurua River, a tributary of the Upper 

 Amazon, and from Marcopata, Peru. 



Saimiri madeira Thomas. 



Saimiri madeira Thos., Ann. Mag. Nat. Hist., II, 1908, 8th Ser., 

 p. 90. 



Type locality. Humayta, Middle Rio Madeira, Ecuador. Type 

 in British Museum. 



Genl. Char. No yellow tinge on head, and no fulvous above hands 

 and feet. 



Color. Top of head and nape, arms from wrists to shoulders, 

 and legs above ankles, chin and lips blue gray ; face, sides of head and 

 neck, entire under parts, inner side of legs and inner side of arms to 

 elbows, white ; inner side of arms below elbows yellowish grading into 

 golden brown at wrists ; hands and feet golden brown ; upper parts 

 of body golden yellow and black ; sides chrome yellow ; tail black 

 above, the yellow at base of hairs showing, beneath white, apical third 

 jet black all around. Ex type British Museum. 



Measurements. Total length, 391 ; tail, 41 ; hind foot, 83. Skull : 

 occipito-nasal length, 69 ; Hensel, 47.3 ; zygomatic width, 40.8 ; palatal 

 length, 27; median length of nasals, 17.6; length of upper molar series, 



