Order Primates. 

 Family Cebidae. Prehensile-tailed Monkeys. 



Subfamily Alouattinae. 

 Genus Alouatta (217). 



Alouatta palliata inconsonans Goldman. 



Alouatta palliata inconsonans Goldm., Smith. Misc. Coll., LX, 1913, 

 No. 22, p. 17. 



Type locality. Cerro Azul, near the headwaters of the Chagres 

 River, Panama. Altitude 2500 feet. 



Genl. Char. Similar to Alouatta palliata but blacker, and with less 

 rufous on upperparts; skull with braincase broader, flatter bullae and 

 narrower premolars. 



Color. Upperparts black; dorsum black mixed finely with buff; 

 chin and limbs black; underparts thinly haired, black; long hairs 

 from flanks brownish ochraceous; tail black. Ex type in United 

 States National Museum. 



Measurements. Total length, 1.272; tail, 715; foot, 143. Skull: 

 Greatest length, 123.5; Hensel, 94.6; zygomatic width, 87.2; inter- 

 temporal width, 12.2; length of nasals, 21.8; palatal length, 46.8; 

 length of upper molar series, 32.2; length of mandible, 76; length of 

 lower molar series, 40; width of third upper premolar (crown), 7.7. 

 Ex type in United States National Museum. 



Subfamily Aotinae. 

 Genus Aotus (218). 



Aotus zonalis Goldman. 



Aotus zonalis Goldm., Smith. Misc. Coll., LXIII, 1914, p. 6. 



Type locality. Gatun, Canal Zone, Panama. Altitude 100 feet. 



Genl. Char. Like A. griseimembra but not so gray; more buffy, 

 carnail and dental characters different. Skull with broader braincase; 

 intertemporal region more depressed; zygomatic arch heavier; bullse 

 less inflated; mandible and teeth heavier. 



Color. Upperparts and limbs wood-brown, suffused with buffy, 



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