NO. 1317. 3fA3fMALS OF NORTHWEST SUMATRA— MILLER. 483 



which killed its mother, was naked except on its scalp, A few days 

 after another female was shot. This had a bab}'- about a month old, 

 which is now (April (*)) well covered with hair and has cut all its milk 

 incisors. It thrives on condensed milk and bananas and is too affec- 

 tionate to l:»e an altogether ag-reeable pet. A later note says that this 

 siamang died of diarrhea on April 14. 



Simia.^ — The orang utan exists, ])ut not al)undanth', about Tapanuli 

 Ba}". Two miles up the Jaga Jaga River some nibong palms were 

 seen that had been broken off by orangs, and also an old sarong 

 (shelter), but the traces were old. There were said to be more a few 

 miles farther inland, particular!}' up the Berdiri River. The natives 

 say they always go about in pairs. This is probal)Iy true, as all the 

 siamang I met with were in pairs, and all gibbons, as far as I know, 

 are monogamous. Often one meets with two or more pairs on a 

 favorite fruit tree, and, of course, they have young ones with them; 

 but they never go in gangs like 3fac<(cus and Pu>il>ytes^ and it is usual 

 for a pair to lie alone or Avith one baby. 



EXPLANATION OF PLATES. 



Plate XVIII. 



Lenothrii: amus, Type. 



Figs. 1-3, skull (natural .size); fig. 4, crowns of lower molars (about X 4); fig. 5, 

 crowns of upper molars (about X 4). 



Plate XIX. 



Ratnfit hcnnta R. palliata. 



Figs. 1-9, posterior termination of nasals and premaxillaries in 9 skulls of Ralufa 

 Lrnata; figs. 10-12, the same in 3 skulls of R. palliata; figs. 13-21, anterior termina- 

 tion of maxillavies in 9 skulls of R. Ixnata; figs. 22-24, the same in 3 skulls of R. 

 pallmta (all about X 1.75). 



Figs. 1 and 13, male, No. 1143.52. Figs. 7 and 19, male, No. 114357. 



2 and 14, female, No. 114349. 8 and 20, male. No. 114350. Type. 



3 and 15, male, No. 114354. 9 and 21, female, No. 114347. 



4 and 16, female, No. 114355. 10 and 22, — , No. 114003. 

 5' and 17, male, No. 114346. 11 and 23, — , No. 114004. 



6 and 18, male, No. 114356. 12 and 24, male. No. 113162. Type. 



Nop. 1-9, 13-21, from Pulo Tuanku; Nos. 10-11, 22-23, from Sumatra, exact 

 locality not known; Nos. 12 and 24, from the Indragiri River, eastern Sumatra. 



