Simiarum et Vespertilionum Brasili. Species Novce. 123 



seem naturally to rank, and to be succeeded by the other Mon- 

 keys of the old continent, by the Baboons, &c. 



In describing these very interesting animals, M. Spix has found 

 it necessary to introduce several new genera, the affinities of 

 which will be best understood by the following table, in which 

 we have referred the several new species to their proper positions, 



Trichiuri 



Cauda apice subtus pilosS. 

 Cauda volubili, apice intorta. 



1. Cebus. C. macrocephalus, libidinosus, xanthoce- 



phalus, unicolor, gracilis, cucullatus. 

 Cauda non volubili 

 abbreviata. 



2. Brachyurus. B. Israelita, Ouakary. 



villos^. 



3. Pithecia. P. hirsuta, inusta, capillamentosa. 



comos^, subtenui. Diurna. 



4. Callithrix. C. personata, cinerascens, nigrifrons, 



Gigot, cuprea. 



laxa, subtenui. Noeturna. 



5. Nyctipithecus. N. felinus, vulpinus. 

 gracili, elongata, non annulata. 



6. Midas. M. fuscicollis, nigricollis, mystax, bicolor. 



gracili, elongata annulata. 



7. Jacchus. J. pygmaeus, albicollis, penicillatus. 

 Gymnuri. 



Cauda apice subtus calvH prehensili. 



Tetradactylus, longimanus, larynge subtuberoso, 



8. Ateles. 



Subpentadactylus, longimanus, larynge non tuberoso, 



9. Brachyteles. B. macrotarsus. 

 Pentadactylus, sublongimanus, larynge non tuberoso. 



10. Gastrimargus. G. olivaceus, infumatus. 

 Pentadactylus, stentor, larynge maxime tuberoso. 



11. Mycetes. M. fuscus, stramineus, barbatus, dis- 

 color. 



