On Two new Australian Mammals. 79 



I have to express my tlianks to Dr. Smith Woodward and 

 Dr. 0. \V. Andrews for their many kindnesses whilst working 

 at the British Museum. 



Bibliography. 



In addition to detailed references in the text see : — 



Bboom, R. 1910. " A Comparison of the Permian Reptiles of North 



America with those of South Africa." Bull. Amer. Mus, Nat. 



ni8t. vol. xxviii. pp. 197-234. 

 . 1911. "On the Structure of the Skull in Cynodont Reptiles." 



Proc. Zool. Soc. 1911, pp. 893-923. 

 . 1911. " On some new South-African Permian Reptiles." Proc. 



Zool. Soc. 1911, pp. 1073-1062. 

 Watson, D. M. S. 1911. " The Skull of Dindemodon, with Notes on 



those of some other Cynodonts." Ann. & Mag. Nat. Hist. ser. 8, 



vol. viii, pp. 293-330. 



V. — Two new Australian Mammals. 

 By Oldfield Thomas. 



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



Nyctophilus geofroyi pallescens, subsp. a. 



A pale desert race of N. geoffroyi. 



Size and other characters as in geofroyi, but colour much 

 paler, that of the upper surface closely agreeing with 

 Ridgway's " drab-grey,'^ and that of the under surface 

 white, though the hairs are slaty at their bases. Ordinary 

 specimens of N. geoffroyi are dark brown, above aad paler 

 brown below. 



Dimensions of the type : — 



Forearm 84 mm. 



Head and body (measured by collector) 49 ; tail 36 ; 

 ear 22. 



Skull: greatest length 15'3; basi-sinual length 11-2; 

 front of canine to back of ni* 5'7. 



Hah. Alexandria, Northern Territory of S. Australia. 

 Alt. 800'. 



Type. Adult male. B.M. no. 7. 1. 4. 1. Original number 

 240. Collected 25th May, 1906, by VV. Stalker. Pre- 

 sented bv Sir W. Ingram and the Hon. John Forrest. 



