12 CERCOPITHECIDJE. 



expressed by a low hoarse monotone ' Jieu,' not so gular or guttural 

 as a growl. Ennui and a desire for company by a whining ' horn.' 

 Invitation, deprecation, entreaty, by a smacking of the lips and a 



Fig. 3. Skull of Macacus rhesus : % diam. (Copied from Anderson, ' An. 

 Zool. Res.') 



Fig. 4. Skull of Macacus rhesus : $ diam. (From Anderson.) 



display of the incisors into a regular broad grin, accompanied with 

 a subdued grunting chuckle, highly expressiA'e, but not to be ren- 

 dered on paper. Fear and alarm by a loud harsh shriek, ' Icra ' or 

 ' Jcraouk,' which serves also as a warning to the others who may be 

 heedless of danger. Unlike the Presbytes (Semnopitheci) and Grib- 

 bons, they have no voice if calling to one another." 



The majority of the species are very docile when young. They 

 thrive well, and several of them have bred in confinement. The 



