190 Dr. D. G. Elliot on apparently new 



characters quite different. Orbits wider and liiglier ; orbital 

 portion of frontal bulging outward, forming a decided cuive 

 from the frontal to the nasals ; nasals longer and wider ; 

 brain-case longer and narrower posteriorly ; extreme width 

 across orbits much greater ; superior outline of skull much 

 less curved; angle of occipital region much less; teeth 

 larger, particularly the last upper molar ; space from poste- 

 rior edge of foramen magnum to interparietal much greater; 

 basioccipital between bullse much wider. 



Colour. Similar to A. Azarce, but more tinged with red on 

 upperparts ; a white spot near each eye extending back upon 

 the head ; a broad black line on middle of forehead from 

 nose to between ears and a narrow black line from corner of 

 eye on each side of the head bordering the white spot ; upper- 

 parts mixed iron-grey and russet, becoming more brownish 

 on lower back ; cheeks and chin white ; sides yellowish 

 brown ; inner side of limbs and underparts pale orange- 

 ochraceous ; hands and feet dark greyish brown ; tail mixed 

 ochraceous rufous and black on basal half, remainder black. 

 The hairs of tail are all ochraceous rufous at base, and this 

 shows more or less throughout the entire length. 



Measurements. Total length 720 ram. ; tail 400 ; hind 

 foot 100; ear 35. Skull: total length 64; occipito-nasal 

 length 61'5 ; hensel 44; zygomatic width 40-5; inter- 

 temporal width 33 ; extreme width of orbits 45 ; height of 

 orbits 21 ; length of nasals 12 ; width of brain-case 35 ; 

 distance from foramen magnum to interparietal 11 ; width of 

 basioccipital between bullte anteriorly 3-5 ; length of upper 

 molar series 14 ; length of mandible 41 ; length of lower 

 molar series 16. 



B.M. no. ot type 7. 8. 2. 9. 



While similar in colour to A. Azarm, the present species 

 differs greatly in its cranial characters. The skull is much 

 larger and the brain-case considerably longer, while the 

 orbits are enormous, very large even for these big-eyed 

 animals. Two specimens (a male and female) were obtained 

 by Mr. J. Steinbach in the Province of Sara, Central 

 Bolivia. 



Genus Saimiri. 

 Saimiri macrodon, sp. n. 



Ti/pe hcaUty. Copataza River, Ecuador. 



Gen. char. Similar to >S'. sciurea, but liands and feet much 

 darker. Skull has a much higher and narrower brain-case, 

 much wider palate, larger teeth, with the external line of the 



