MAMMALS COLLECTED BY DR. W. L. ABBOTT 24I 



MACACUS PUMILUS sp. nov. 



Type. — Adult male (skin and skull). No. 101639 United States 

 National Museum, Pulo Bunoa, Tambelan Islands, August 6, 1899. 



Characters. — A dwarf form of jMacaczis ' cynomolgus ' Colors 

 slightly paler than in specimens from the mainland. 



Color. — The color is so nearly like that of the common Macacus 

 ' cynomolgus ' of the mainland that no detailed description is neces- 

 sary. Throughout it is a shade more pale, particularly on the throat, 

 chest, belly, and inner side of thighs. 



Skull and ^ee/i^.— Except for their smaller size the skull and teeth 

 resemble those of M. ' cytiomolgus^^ though the palate appears to be 

 broader and less arched. The crowns of the molars are more squarish 

 in outline than those of the mainland animal and the posterior upper 

 tooth is relatively smaller. 



Measurements. — External measurements of t3'pe : total length 990 ; 

 head and body 431; tail vertebras 559; hind foot 120. External 

 measurements of an adult male from Pulo Siantan, Anambas Islands : 

 total length 1003; head and body 470 ; tail vertebrae 533 ; hind foot 



Cranial measurements of type : greatest length (exclusive of in- 

 cisors) no (123) ; ^ basal length 83 (92); basilar length 77 (87); 

 least palatal length 37.4 (45) ; palatal breadth (between front molars) 

 21.6 (19); zygomatic breadth 77 (81); mastoid breadth 56 (61); 

 greatest breadth of braincase above roots of zygomata, 53 (53) ; least 

 breadth of braincase immediately behind orbits 39.4 (39-6) ; orbital 

 breadth, 59 (64) ; least distance from orbit to alveolus of inner in- 

 cisor 36 (43) ; greatest depth of braincase (exclusive of sagittal crest) 

 45 (45); mandible 81 (92); greatest depth of ramus 17.8 (21.4); 

 maxillary toothrow (exclusive of incisors) 35.6 (41.4) ; mandibular 

 toothrow (exclusive of incisors) 41 (46.4) ; crown of middle upper 

 molar 7x8 (7.8 X 7.8) crown of middle lower molar 6.^ X 7 (8 

 X 6.8). 



Specimens examined. — Four, from the following localities: Pulo 

 Bunoa, Tambelan Islands,2: Pulo Wai, Tambelan Islands, i; Pulo 

 Siantan, Anambas Islands, i. 



Remarks. — The small macac of the Tambelan and Anambas is- 

 lands appears to differ very constantly in size from the large Macacus 

 *■ cynomolgtis ' oi the mainland and Linga Island. In color the two 

 animals are essentially alike. 



' Measurements in parentheses are those of a younger male M. ' cy7iomolgus ' 

 from Trong, Lower Siam. 



