180 SENIOCEBUS 



to indicate. These animals possess somewhat rounded heads, and 

 large eyes and mouths ; the ears are conspicuous, standing out from the 

 hair, and the face is small and short. Rather long whiskers and manes 

 are often present. In captivity, even in their own land, they rarely 

 live long, and usually succumb in a brief period when carried to 

 northern climes, cold temperatures being fatal to them. They are 

 pretty creatures, and a number of the species bear a certain resemblance 

 to each other, and so it is possible to arrange them in groups, dis- 

 tinguished by the hair on head and neck, being respectively long or 

 short. 



LITERATURE OF THE SPECIES OF THE FOUR GENERA OF 

 TAMARINS AND MARMOSETS. 



1758. Linnceus, Sy sterna Natures. 



Two species are described as Simla cedipus = CEdipomidas 

 ozdipus ; and Simia midas = Cercopithecus midas. 



1766. Linnceus, Sy sterna Naturae. 



The two species of the earlier edition of this work are also 

 given in this one, and another added, Simia rosalia = Leonto- 



CEBUS ROSALIA. 



1777. Erxleben, Systema Regni Animalis. 



Under the genus Callithrix, in which the earlier writers were 

 accustomed to place the Tamarins, three species only are given : 

 (C.) cedipus; (C) rosalia; and (C.) midas. 



1788. Gmelin, Systema Natures. 



The three Linnaean species already mentioned are here recorded, 

 and no new ones added. 



1806. Fischer, in Bulletin de la Societe Imperiale de Moscou. 

 Cercopithecus midas redescribed as Simia lacepedii. 



1811, Humboldt et Bonpland, Recueil d' Observations de Zoologie 

 (1815).^ d'Anatomie Comparee. 



Leontocebus leonina described as Simia leonina. 



1812. E. Geoffroy Saint-Hilaire, in Annates du Museum d'Histoire 

 Naturelle, Paris. 



Six species are enumerated under the genus Midas, the valid 

 ones being, (M.) ursulus = Cercopithecus ursulus; (M.) 

 labiatus — Leontocebus labiatus; (M.) rosalia = Leontoce- 

 bus rosalia; (M.) cedipus = CEdipomidas cedipus; and (M.) 

 ruHmanus — Cercopithecus rufimanus. The remaining (M.) 

 leoninus is a most doubtful species, no examples ever having 



