ON MAMMALS FROM EAST-SUMATRA. 21 



Bencoelen and Indrapore, and distinguished exteriorly by 

 a slight difference in tinge, but according to Schlegel 

 S. ferrugineus has 13 pairs of ribbs, meanwhile S. mela- 

 lophits presents 12 pairs. 



Our Museum procured from the Dutch Scientific Expe- 

 dition to Sumatra skins and skeletons of a Monkey , from 

 the interior of Padang , belonging to S. melalophus. The 

 skeletons (Jentink, Catalogue Ostéologicpue , 1887, p. 10) 

 however present the following numbers of ribbs : sk. b 

 has 13 ribbs to the left side and 12 to the right side, 

 sk. c has 12 to the left and 13 to the right, sks. d and 

 e present 12 ribbs to the right and 12 to the left. More- 

 over in sk. c of the so called S. ferrugineus I find 13 

 ribbs to the right and 12 to the left, and not 13 pairs 

 of ribbs as Schlegel stated in his Catalogue. There is thus 

 no reason to accept Schlegel 's new species , as the number 

 of ribbs , being preponderant in Schlegel's opinion , is so 

 very inconstant. 



The young of Hagen's Monkey being golden-yellow and 

 the skulls of the adult specimens agreeing very well with 

 the skulls in our collection, I refer these individuals to 

 the above named species, so that S. melalophus now is 

 known from the Malayan Peninsula and from East- and 

 West-Sumatra. 



4. Cercocebus cynamolgos Schreber. 



Tandjong-Morawa. n. i. Kara. 



In our Museum are specimens from Rangoon , Cambodga , 

 Malacca, Sumatra, Borneo, Java, Timor and the Philippines. 



5. Macacus nemestrinus Desmarest. 



Tandjong-Morawa. n. i. Bru. 



Hab. Tenasserim, Malayan Peninsula, Sumatra, Banka 

 and Borneo. 



6. Ny cticebus t ar dig radu s Linnaeus. 



Tandjong-Morawa. n. i. Bukang or Piucha tingaling. 



Notes from the Leyden Museum, Vol. XI. 



