On new West African Mammals. 351 



in proportion than in the latter, the intertemporal constriction 

 especially much less marked. Teeth smaller and lighter than 

 in the other species, the distance from the front of the canine 

 to the back of m 3 11*5 mm., as against 12*6 in moschatus and 

 14 in lepturus. Anterior breadth of m l 2*5 mm., 2*9 in mos- 

 chatus, and slightly more in lepturus. One minute lower 

 premolar only, as usual in Scaptochirus, the condition in the 

 type of lepturus being abnormal, as evidenced by other 

 specimens since received from Pekin. 



Length of hind foot (c. u.) 19* J mm. ; breadth of fore 

 12-5; tail 16. 



Skull: greatest length 30 7; basal length 26; greatest 

 breadth 17*2; intertemporal breadth 7"S ; palate length 13; 

 front of canine to back of??? 3 11*5. 



Bab. Ho-tsin, S.W. Shan-si. 



Type. Adult. B.M. no. 10. 3. 13. 1. Collected Novem- 

 ber 1909, and presented by Mr. Robert GiU'es. 



On the discovery that the additional lower tooth of the 

 type of "Talpa leptura," which gave it the dental formula of 

 Parasct ptor and was the primary reason for my description of 

 the species, was an individual abnormality, it was supposed 

 that lepturus was only a synonym of mosch itus. But I have 

 recently had the opportunity of examining the typical skull 

 of the latter in the Paris Museum, and find that it is decidedly 

 smaller than that of lepturus, while the comparatively long 

 tail of the latter also distinguishes it. S. moschatus was 

 desciibed as from iC Chinese Mongolia," and probably comes 

 from somewhere near or beyond Suen-hoa-fu, where David 

 collected the majority of his " Mongolian" animals. 



The Ho-tsin mole again would seem to form a third species 

 of the group, slightly smaller than S. moschatus, with 

 decidedly smaller teeth and with a tail as long as in the 

 Pekin animal. 



XLVII. — Three new West African Mammals. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



Perodictlcus ju-ju, sp. n. 



A grey member of the small-toothed group. 

 Size, judging by skull, about as in P.batesi. Fur close 

 and woolly, much shorter than in P. ibeanus. Bristle-hairs 



