130 MR. OLDFTELD THOMAS OX 



IIhyxchoxax Thos. 

 Teeth -*- X 2 = .''.8 : p' and i, present; no p,,. Complete dental 



10 

 9 

 formnla as follow; 



f 1 . 2 . (I f 1 . 2 . 3 . 4 



1.2.0 



1 I 2.3.4 1 



I. ^ 0. y, - p. -< M. 



10.2.3 j 1 I 2.3.4 1.2.3 



i^O.2.3 LI l^ 1.2. 0.4 



Type : — Rhyxchonax axdersoxi. 



Uropsilus soricipes Thos. P. Z. S. 1911, p. 163, nee M.-Edw. 



Ji. andersoni Thos. Abstr. P. Z. S. 1911, p. 49 (Oct. 31). 



Size comparatively large. Colour dark, approaching " clove- 

 brown," the lighter specimens near " bistre." Under surface dark 

 slaty. Tail scaly, almost naked, scarce!}' lighter below than 

 above (summer specimens only seen). Teeth described I. c, but 

 the dental formula thei'e given proves to be incori-ect and should 

 be as above. 



Dimensions of the type, measured in the flesh : — 



Head and body 70 mm. ; tail 67 ; hind foot 15-5. 



Skull: greatest length 21-7; basal length 17' 5; zygomatic 

 breadth 11"6 ; interorbital length 5'5 ; breadth of brain-case 1 1'3 ; 

 upper tooth-series 9 '7. 



Hab. Omi-san, Omi-hsien, S. Sze-chwan. 9500'. 



Type. Adult male. B.M. No. 11.2.1.25. Original number 2504. 

 Collected 15 August, 1910. Nine specimens examined. 



In naming this final species after Mr. Malcolm Anderson, I 

 would recall not only the wonderful success he has made of the 

 whole expedition, b\it also the extent to which he has increased 

 our material, and with it our knowledge, of this particular gi'oup 

 of Mamixials. Pi'actically the whole of our magnificent series of 

 Urotrichus was obtained by him, including the specimens on 

 which three new subspecies were founded, all our Uropsilus, 

 Rhynchonax, and Nasillus were sent by him, while even our 

 examples of Dymecodon were obtained by a Japanese whom he 

 had taught to collect. 



7. Nasillus gracilis. 



Thos. Abstr. P. Z. S. 1911, p. 49 (Oct. 31). 



5 . 256G. Mt. Chin-fu-san, near Nan-chwan, S.E. Sze-chwan, 

 4000'. 20 September, 1910. B.M. No. 11.9.1.13. Type. 



A comparatively small species, with peculiar dental formula. 



Size decidedly less than in the other species, the hind foot 

 1-2 mm. shorter, and the skull smaller in all dimensions. 

 General colour above near " sepia," very much as in Uropsilus 

 soricipes, RhyncJionax andersoni being darker. Under surface 



