N. GYLDENSTOLPE, MAMMALS COLLECTED IN SIAM. 19 



9 Kariman 9 Sakerat 



Greatest length 31, o mm. 33,5 mm. 



Length from condylus to gnathion 27, o » 32,4 » 



Basicrauial length 24,5 » 27,6 » 



Greatest width of brain-case 13,3 » 14,2 » 



Zygomatic breadth 14,5 » 17,0 » 



Breadth between meatus auditorius 11,5 » 13,4 



Least interorbital breadth 5, o » 5,1 » 



Length of diastema 8,6 » 9, o » 



Palatilar length 14, o » 17,1 » 



Length of palatilar foramina 6,1 » 6, o » 



Breadth of combined foramina 2,1 » 1,9 » 



Breadth between anterior molars 4, o » 3,5 » 



Length of maxillar tooth-row 5, o » 6,5 » 



21. Rhizomys minor Gray. — Gray. Ann. & Mag. 

 Nat. Hist. X, 1842 p. 226. — Fairly common in Eastern 

 Siarn and in the collection there are two female specimens 

 obtained by the natives during my stay at Sakerat. As this 

 species is ohiefly nocturnal I never observed but its holes 

 in the ground. The flesh is very much appreciated by the 

 natives who often used to dig out these animals. 



Both the specimens obtained seem to be full grown ac- 

 cording to the general appearance of their skulls but they 

 are rather smaller than typical Rhizomys minor Gray. The 

 fur is also of a somewhat different colour, being bluish-gray 

 instead of asby brown. The white patch on the forehead is 

 strongly marked. 



In Siamese this Bamboo-rat is called »Thur» and when 

 I had my camp near Kao Plyng I heard about another much 

 larger Bamboo-rat which was called »Woon» by the natives. 

 Unfortunately I never succeeded in getting this animal but 

 I think it may have been Rhizomys sumatrensis Raffles. 



Skull measurements : 



Length from condylus to gnathion 



Basicrauial length 



Greatest zygomatic breadth . . . 

 » width of brain-case . . . 



