Tico new Murines from Peru. 35^ 



broad, strap-like, short antero-posteriorly. Palatal foramina 

 large and open. Bullae small. Molars broad and heavy. 



Dimensions of the type (measured in the flesh by col- 

 lector) : — 



Head and body 1G8 millim. ; tail 180; hind foot 35; 

 ear 25. 



Skull : greatest length 40 ; basilar length .^2-2 ; greatest 

 breadth 22-3; nasals 15-6x5; interorbital breadth 4-2; 

 interparietal 3-8x1 1-2; palatal length from henselion 17-4 ; 

 diastema 11-1 ; palatal foramina 9-2x3-2; lengtii of upper 

 molar series 7*6. 



Ilab. Eastern slope of Paramo between San Pablo and 

 Cajamarca, Peru. Alt. 4000 metres. 



Ti/pe. Female. B.M. no. 0. 3. 15. 3. Original number 719. 

 Collected by Mr. Perry 0. Simons, 1 0th November, 1899. 

 One specimen only. 



This fine species is no doubt most nearly allied to the 

 Ecuadorean 0. aureus and the Bogotan 0. princej^ts, formino- 

 with these a small section of the genus, characterized by large 

 size, soft fur, obsolete supraorbital ridges, large open palatal 

 foramina, and a mountain habitat. As a species 0. prcetor is 

 distinguished from the other two by many characters, of 

 which the most obvious are its non-rufous colour and white 

 feet. 



At the same place as the type of 0. prcetor Mr. Simons 

 obtained two rats referable to the interesting " J'homasomys " 

 cinereuSj first discovered by Dr. Stolzmann at Cutervo. 



Phylloiis amicus, sp. n. 



Intermediate both in size and colour between Ph. Haggardi 

 and the peculiar little desert species Ph. gerhitlus, whose 

 reference to this group it satisfactorily confirms. 



Fur fine, soft and sleek ; the hairs on the back about 

 8-9 millim. in length. General colour above fawn-grey, 

 finely lined with black. Face and crown quite like back. 

 A line along cheeks, sides of neck, and flanks bright sandy 

 yellow, dividing the dorsal colour from that of the belly. 

 Under surface white, the bases of the hairs slaty. Ears very 

 large, finely haired, their outer surface greyish brown, their 

 inner fawn-grey. Upper surface of hands and feet pure 

 white. Tail long, well-haired, and slightly pencilled ter- 

 minally, brown above, white below. 



Skull in general form quite' like those of the two species 

 above named, but its bullae in correlation with the external 

 ears, are unusually large, being larger than in the decidedly 

 bigger species Ph. Haggardi. 



