1G2 THE NATURAL HISTOET OF 



than the specimen figured by Dr Horsfield. T'ie 

 canine tooth is there exhibited, standing nearly one- 



half longer than the others, and grooved on the inner 

 surface. The chief difference in the molar teeth is in 

 the posterior grinder of the lower jaw having distinctly 



five points, which distinguishes it from Cercopithecus, 

 and which will be better understood by comparing 

 the cuts now introduced with those accompanying 

 the true Guenons. 



Dr Horsfield had taken the Negro monkey as the 

 type of this form, whereas F. Cuvier selects another 

 animal as more characteristic ; and we are the more 

 inclined to follow this arrangement, as the Doctor him- 

 self observes that S. maurus is more robust in make 

 than its congeners, and the slender proportions are one 

 of the first characters which strike the attention. Th 

 animal we allude to is, 



