388 Mr. G. E. H. Barrett-Hamilton on some 



General colour above dark bistre brown, the ends of the 

 hairs prominently lighter, buffy brown. Below, similar but 

 lighter. Hinder aspect of pubis buffy to base of hairs. 



Skull long and low, with a very deep nasal notch. Teeth 

 on the whole like those of P. ceylonicus (P. indicus, Dobs.). 

 Inner incisors long, their secondary cusp well developed, 

 postero-external ; outer incisors just equalling in length the 

 secondary cusp on the inner ones and with an indistinct, low, 

 postero-internal, basal cusp, and a posterior hollow for the 

 tips of the lower canines, as in P. ceylonicus. Large pre- 

 molar close to back of canine; the well-developed small pre- 

 molar visible with difficulty from without. Lower incisors 

 slender, scarcely overlapping. Lower canines with a broad 

 cingulum, making its section circular. Anterior lower pre- 

 molar three fourths the height of the second. 



Dimensions of the type (measured in spirit) : — 



Foream 37 mm. (range 36-39). 



Head and body 51; tail 36; head 18; ear 13'5; third 

 finger 65; tibia 12; hind foot (c. u.) 9; penis 15, its terminal 

 portion (with the bone) 11. 



Skull : greatest length 14*5 ; upper length in middle line 

 12 ; basal length in middle line 10'9; zygomatic breadth 10*6 

 interorbital breadth 6*1 ; constriction 4 ; mastoid breadth 8'6 

 length of brain-case 5'7 ; front of canine to back of m 3 6 

 front of lower canine to back of m 3 6*1. 



JJab. Tonkin. 



Type. Adult male in British Museum. Collected by 

 Mr. 11. Fruhstorfer. Six specimens examined. 



This species may be readily distinguished from all its allies 

 by the enormous size of the penis and the presence of a bone 

 in that organ. From Dobson's " Vesperugo affinis," only 

 known from a female, it may be separated by its shorter and 

 fewer-jointed tail, stouter feet, shorter tibiae, and other 

 characters. P. hracliypterus, Temm., of which I have not 

 seen a specimen, has shorter outer incisors and the wing- 

 membrane arises from the tarsus ; described originally from 

 an old male in spirit, no mention is made of the penis. 



XLVII. — Notes and Descriptions of some new Species and 

 Subspecies of Mustelidse. By G. E. H. Barrett- Hamilton. 



In working through the Mustelidse in the British Museum of 

 Natural History 1 find several forms which seem to me to be 

 worthy of recognition mainly because they are either distin- 

 guishable as local races of well-known species, or, as in the 



