190 PON GO 



1841. /. Geoffroy, in Archives du Museum d'Histoire Naturelle, Paris. 



A young Sumatran Ourang is here named Simia bicolor. 

 1851. /. Geoffroy St. Hilaire, Catalogue des Mammifdres. 



Two species of Ourang are recognized under the genus Simia: 



S. satyrus Linn., and S. bicolor I. Geoff., both == Pongo 



PYGM^us Hoppius. 

 1853. Blyth, in Journal of the Asiatic Society of Bengal. 



P. PYGM^us is here redescribed as Pithecus brooki, and Pithe- 



cus oweni. 



1855. Blyth, in Journal of the Asiatic Society of Bengal. 

 Pongo pygm^us redescribed as Pithecus curtus. 



1856. R. Owen, in Transactions of the Zoological Society of London. 

 In this paper the Author compares the skull of an Ourang from 

 Borneo, which he named P. morio, with those of the P. satyrus 

 Linn., (1766), = Pongo pygm^us Hoppius; and is not con- 

 vinced that it represents a distinct species, for in his concluding 

 remarks he says, "As to the primitive originality of the Pithecus 

 morio in Borneo, I by no means entertain a decided opmion. 

 Had the whole dental series been proportionally smaller, as it 

 is in the Troglodytes niger in comparison with the Trogl. 

 gorilla, there might have been more reason for concluding as 

 to the distinction of the species." 



1869. A. R. Wallace, The Malay Archipelago. 



In this work the Author gives a full and interesting account 

 of the habits of the Ourang, as observed by him in Borneo. 



1896. Selenka, in Sitzungsberichte Konigliche Akademie der Wissen- 

 schaften, Berlin. 



In this paper the Author describes the species and races he 

 recognizes, establishing them upon the large collections of these 

 animals obtained by him "on the right side of the river region 

 of the Kapus" ; founding his conclusions on "some variations 

 of skull formation and on the milk and permanent teeth of 

 these animals." In this restricted district he establishes six 

 races as follows : Pithecus satyrus landakensis ; P. s. dadap- 

 pensis; P. s. genepaiensis; P. s. skalauensis ; and P. s. tuak- 

 ensis; all = Pongo pygm^us Hoppius, according to the inves- 

 tigations of the writer, who could find no characters sufficiently 

 distinctive in Selenka's material in the Munich Museum by 

 which these forms could be established, the variations being 

 so great as to make it difficult if not impossible to find two 

 skulls that agreed in their individual peculiarities. 



