782 DR. J. MURIE ON MAQACUS SPECIOSUS. [June 18, 



M. speciosus. M. inuus. 



inches. inches. 

 Cranial base between post, nares and anterior 



margin of foramen magnum T45 1*5 



Width betwixt the postglenoidal tubercles . . 2-2 2*7 



Mandible, extreme length of bone 3'05 3*5 



Height at coronoid process 1*6 2 - 2 



The spinal column with and without the tail is longer than in the 

 Bornean Monkey (M. maurus). The vertebrae are not so strong as 

 in it — a circumstance not due to difference of age ; for, judging by the 

 dentition, they are on a par in this respect. The several vertebral pro- 

 cesses seem liner in their proportions ; and the lumbar transverse ones 

 are decidedly shorter and turned more sharply forwards than in M. 

 maurus. Vertebral numbers 7 C, 12 D., 7L., 3 S., and 11 C.,=40. 

 Ribs 24 in all. 



The sacrum has the flatness, both superiorly and inferiorly, 

 common to the genus. The united bodies of the three vertebras 

 composing it are barely so long as the transverse diameter at its 



Fig.l. 



Sacro-caudal vertebrae and pelvis of Macacvs speciosus $ . 

 A. Outside view. B. Seen interiorly- 



middle, or respectively 1*25 and 1*45 inch ; but if the length from 

 the anterior point of the sacro-iliac synchondroses be taken, it exceeds 

 the breadth by 03 inch. The spine of the first sacral is well marked 



