INTRODUCTION Ixxxiii 



ANTHROPOIDEA. 

 Callitrichid^. 

 Seniocebus. 

 Range of the Genus. 

 Neotropical Region. 

 Range of the Species. 



108. Seniocebus bicolor. Eastern bank of the Rio Negro, Brazil. 



Pebas, Peru ; Upper Amazon west of Barra. 



109. Seniocebus meticulosus. Forests of the River San Jorge, 



Colombia. 



110. Seniocebus MARTiNSi. Faro, Lower Yamunda River, Amazon, 



Brazil. 



Cercopithecus. 

 Range of the Genus. 

 Neotropical Region 

 Range of the Species. 



111. Cercopithecus midas. English and Dutch Guianas. 



112. Cercopithecus rufimanus. French Guiana, banks of the Rio 



Araguay. Province of Goyas, Brazil. 



113. Cercopithecus ursulus. Lower Amazon ; and near the mouth 



of the River Tocantins. 



Leontocebus. 

 Range of the Genus. 

 Neotropical Region. 

 Range of the Species. 



114. Leontocebus labiatus. Forests on the north side of the Ama- 



zon, Rio Javari, Rio Solimoens, and in Peru. 



115. Leontocebus pile.\tus. Upper Amazon, range unknown. 



116. Leontocebus thomasi. Tonantins, Upper Amazon. 



