142 Mr. O. Thomas on 



Asia Pithech'inis, ILipnIomys, and many others from the 

 terrestrial forms found there. 



A second species formerly put in Mus is the curious white- 

 tailed M. woosnaitii, Schwann*, of Beehuanaland, which 

 is even more decidedly different from any liuttus than is 

 Thulloniys niyricauda. Its unusual pr(jportions, with the 

 tail only ahout equal to the length of the body without the 

 head, the entire absence of supraorbital ridges, and the struc- 

 ture of the molars, of which m' is greatly reduced and 

 simplified, all testify to its being an animal which could not 

 by any possible stretch of the genus be nowadays put iu 

 Rattus. Nor is any other genus more nearly related to it, 

 though there is about it a certain superficial resemblance 

 to Saccostomus which a closer study soon shows to be 

 deceptive. 



As Mr. Schwann has given a full description of tlie 

 distinctive characters, with figure of the animal, T do not 

 jjropose to redescribe it, but simply suggest for it the name 

 derived from its general pallor and white tail of 



OcHROMVS, gen. nov. 

 Genotype, Ochromys ivoosiiami (^Mas woosiiami, Schwann). 



XVI. — A new Tapliozous /rom the Siulun. 

 By Uldfield Thomas. 



(Published by penuissiou of the Trustees of the IJritish Museum.) 



Among a number of small mammals collected in tiio Sudan 

 by Major J. JStevensun Hamilton, and sent to the British 

 Museum for determination \)y the Wellcome llesearch 

 Laboratories, Khartoum, there occurs a .'specimen of the 

 followin<^ new bat, which I have gicab pleasure in naming iu 

 honour of its discoverer : — 



Taphozoua hamiltoniy sp. n. 



A fairly large species of the group with a iwiUtd gular 

 patch in the female — a |,oiich therefore probably present iu 

 the mule. 



* r. Z. S. 1!>00, p. IU,--, pi. vi. (uuimal). 



