4 ARKIV FÖR ZOOLOGI. BAND 8. N:0 23. 



Then they began again their interrupted search for food as 

 if nothing had happened. 



This species seems to be very quarrelsome with their 

 own comrades and they were often chasing each other with 

 utmost rapidity, especially when one of the party had found 

 a real delicacy in the form of a great ripe fruit, or a big 

 crab. 



The Siamese are very fond of keeping animals in capti- 

 vity and this species was often seen in the native villages. 

 Trapped as a young it will soon be very tame and very 

 amusing with its droll frolics, but the old, and especially the 

 males, are not to be relied upon and sometimes rather fierce. 



The skull of an old female obtained near Sakerat on the 

 8th of January 1912 measures as follows: 



Total length = 124,5 mm. 



Condylobasal length = 93,2 » 



Basicraiiial » = 83,5 » 



Occipitonasal » = 103, o » 



Zygomatic breadth = 86,2 » 



Greatest » of brain-case = 59,3 » 



Least postorbital width = 39,8 » 



» interorbital width = 7,8 » 



Breadth across middle of orbits = 66, o » 



» of snout across last premolar = 34, o » 



Length of palate mesially = 50, i » 



Width of palate between last molars = 20, o » 



Front of canine to back of m 3 = 39, o » 



Distance from occiput to middle of superciliary ridge = 71, o > 



» » mesial point of superciliary ridge to tip 



of premaxillary = 69, o » 



Length of upper molar series = 31,0 » 



» » lower » » = 37,3 » 



2. Pithecus nemestrimus L. — The Pig-tailed monkey 

 only occurs in Northern Siarn according to the natives. I 

 only once observed a short-tailed monkey in the great ever- 

 green hill-f orests north of the Meh Lem river. The speci- 

 men in question was very shy and though I made several 

 efforts to get within range it was all in vain. Therefore it is 

 impossible for me to state if it was this or another allied 

 species, but I believe it was Pithecus nemestrinus L. 



