1902.] NATURAL SCIENCES OF THILADELPHIA. 159 



Semnopitheous sumatranus Miiller and Schlegel. 



1830. Semnopithecus femoralis Horsfield, Appendix to Memoir of 



Life of Raffles, p. 642. Nomen nudum. 

 1839-44. Semnopithecus sumatranus Miiller and Schlegel, Verhandel. 



over de natuurlijke Geschiedenis der Nederl. overzeesche bezit- 



tingen, p. 73. 

 1851. Semnopitliecus femoralis Horsfield, Catal. Mamm. Mus. Hon. 



East Ind. Company, p. 10. 



This monkey was met with on the bauks of the ludragiri river, 

 where it was less numerous than S. vianrus. Native name, ka'hka. 

 Two specimens taken. 



Hylobates hoolock (Harlan). 



Five gibbons taken on the banks of the Indragiri river appear 

 to be referable to this species. They agree perfectly with the 

 description given by Blauford, and are evidently distinct from H. 

 lar, numerous specimens of which have been collected by Dr. 

 Abbott on the Malay Peninsula. 



