Mr. O. Thomas on Ferret-Badgers. 193 
ease 14°35; palatine foramina 10 ; palatal bridge 2 ; antero- 
posterior length of bulla 95 ; upper tooth-series (alveoli) 6°7. 
Hab. W. Sze-chwan. Type from Shu-o-lo (Tschuwo), 
Nia-nong, N.W. of Ta-chien-lu. Alt. 13,000’. 
Type. Adult male. B.M. no. 13. 9.13.16. Collector’s 
number 246. Harvard number 7601. Collected 20th August, 
1908, by W. R. Zappey. Received in exchange from the 
Museum of Comparative Zoology, Harvard. 
The light nape-patches are no doubt less developed in 
winter, but, as I have had for comparison an August specimen 
of thibetana collected by Mr. Anderson, I have been able to 
see that they are certainly more conspicuous in zappeyi than 
they are in thibetana. 
This species was named O. hodgsoni in Mr. Glover Allen’s 
admirable paper on Sze-chwan mammals, he, like other 
people, having been deceived by the confusion which has 
surrounded the determination of these small Pikas, and espe 
cially by the mistaken identification of the somewhat similar 
Sikim species with O. hodgsont: by Bonhote. I have named 
it after Mr. Zappey, who made the fine collection in which it 
occurs. 
XIX.—Some Notes on Ferret-Badgers. 
By OLDFIELD ‘THOMAS. 
(Published by permission of the Trustees of the British Museum.) 
OwING to their extreme external resemblance to one another, 
all the ferret-badgers have usually been considered as of one 
genus, though sorted into groups according to the sizes of 
their teeth. The differences in the teeth, however, are so 
great that I consider that the large-toothed forms (Jelogale) 
and the small-toothed forms (//elict’s) should be generically 
distinguished, especially as the characters of the baculum 
both confirm the division and indicate a reason for the sepa- 
ration of a third genus for the N.-Bornean species Helictis 
everetti. Merely going by the teeth, the position of this 
species had been somewhat doubtful and a cause of hesitation 
in the frank separation of the groups. 
So far as appears, //. everett? would appear to be annectant 
Ann. & Mag. N. Hist. Ser. 9. Vol. ix. 13 
