184 Mr. O. Thomas on new 



Eyes apparently very small. Fur very fine, long and silky ; 

 liairs of the back 11-12 millim. in length. General colour 

 above very finely speckled dark olivaceous grey, very uniform 

 in tone all over. Top of muzzle rather blacker. Head like 

 back , but the speckling rather coarser. Ears short, well-haired, 

 blackish brown. Sides scarcely paler than back. Under 

 surface brownish grey, the bases of the hairs plumbeous, 

 their tips dull greyish ; no line of demarcation on sides. 

 Upper surface of hands and feet brown. Tail about the 

 length of the head and body, very finely scaled, thinly haired, 

 uniform dark brown throughout. 



Skull very thin and papery, the surfaces smoothly rounded 

 and without ridges ; muzzle narrow, eveidy tapering, not 

 irumpet-shaped anteriorly ; interorbital broad, smoothly 

 rounded; interparietal minute; palatal foramina long, 

 reaching nearly to the middle of m}. 



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



Head and body 92 millim.; tail 96; hind foot (s. u.) 22 ; 

 ear 17. 



Skull: greatest length 27; basilar length 20*5; zygo- 

 matic breadth 18"5; length of nasals 11 ; interorbital breadth 

 5'7 ; breadth of brain-case 13; diastema 7*2; palate from 

 henselion 11*6; palatal foramina 5'8x 2'1 ; length of upper 

 molar series 4"7. 



Hah. Limbane, Dept. Puno. Alt. 2600 m. 



lype. Female. B.M. no. 1. 1. 1. 48. Original number 

 1126. Collected 6th July, 1900, by Mr. P. 0. Simons. 

 Four specimens examined. 



Ko one would take this remarkable little animal for anything 

 but an Alcodon without examining the skull; but the cranial 

 characters show it to be a member of the group of Oxymycteri 

 which contains 0. hogotensis, Thos.*, and 0. lanosus, Thos. f, 

 from both of which it may be readily distinguished by its 

 colour and proportions. 



Akodon pulcliei-riinus and its subspecies. 



Of the beautiful mouse discovered by Mr. Kalinowski at 

 Puno, and described by me in 1897 % under the above name, 

 Mr. Simons has sent a number of examples from different 

 localities in South-eastern Peru — Sumbay, Caylloma, Crucero, 

 and the Inambari River ; and Mr. Bernard Hunt has also 



* Acodon hogotensis, Thos. Ann. & Mag. Nat. Hist. (6) xvi. p. 369 

 (1895J. 

 t Ann. & Mag. Nat. Hist. (6) xx. p. 218 (1897). 

 j 1 om. cit. p. 649 (1897). 



