w€JO Bats and Rodents from S. America. 411 



Tn general proportions of body and skull this species 

 resembles the Salta E. fossor, but is distinguished by its 

 normal-sized claws, that animal having them elongated as in 

 the subgenus Chelemys. 



Reithrodon cuniculoides Jlammarum, subsp. n. 



A large pale race of R. cuniculoides. 



Size comparatively large, larger than in any other member 

 of the genus. General colour pale, as in tiie typical race, 

 much paler than in the inland forms hatcheri and ohscurus. 

 Posterior back suffused with bufFy. Sides with the bufFy 

 wash at a maximum, the flanks and under surface bright 

 " buff," Feet and tail heavily haired, the latter with a well- 

 defined dark line along its upper surface. 



Skull longer and more bowed than in the allied forms, so 

 that the height is markedly greater. 



Dimensions of the type (measured in the flesh) : — 



Head and body 169 mm. ; tail 100 ; hind foot (s. u.) 34 ; 

 ear 18. 



Skull : greatest length 37'4 ; condylo-incisive length 34*8 ; 

 zygomatic breadth 21; nasals 16'7 ; interorbital breadth 4'4 ; 

 height from anterior base of in^ 12*3 ; palatilar length 19 ; 

 palatal foramina 1 J ; upper molar series 6 4. 



Ilcdj. Tierra del Fuego. Type from Spring-hill, in the 

 north of the islatid. 



Type. Adult male. B.M. no. 9. 9. 10. 1. Original number 

 357. Collected 15th June, 1909, by Dr. W. H. France, and 

 presented through Mr. J. A. WolfFsohn, of A^alparaiso. 



The Tierra del Fuego Reithrodon seems to be rather 

 larger than the typical form of Eastern Patagonia and is paler 

 coloured than the two inland races described by Dr. Allen, 

 R. c. ohscurus of Punta Arenas * and R. hatcheri of the 

 Cordilleras farther north. How these two latter difier from 

 each other is not clear, as each is simply diagnosed as being 

 darker than R. cuniculoides. Dr. Allen has given the skull- 

 length of a series of three cuniculoides as 33-35 mm., while 

 the type skull of hatcheri is 35*7 in length. The Tierra del 

 Fuego animal, with a skull-length of 37*4, is therefore 

 markedly larger than either. 



* Probably pachycephalus, Philippi, 1900, based on a young specimen : 

 ef. Wolffsohn, Bol. Mus. Chile, ii. p. 101 (1910). 



28* 



