yammah from Pern and Bolivin. 189 



Xectomys Oarleppti, Tlios. 



Xeacomj/s spinosus, Thos. 



Dr. Allen's Inambari record for this species was quite to be 

 expected, as Mr. Simons has found it both on the Peren^ and 

 at Mapiri, on the Beni. 



Ichthyomys Stohniannif Thos. 

 Marcapata. J. Kalinowski. 



Oxymycterus juUacce, All. 



Skeleton 9 , Kio Inambari. Simons. 



It is unfortunate that Mr. Simons did not obtain a skin of 

 this species for comparison with 0. inca and iris\ but the 

 skull, which is barely adult, is not exactly like that of either. 



Ouyviycttrus api'cah's, Allen. 



One specimen. Santo Domingo, 13° 5' S. and 70° W. 

 1800 m. 21st July. Topotype. 



This most remarkable rat is so unlike any previously 

 known species of Oxi/mycUrus that until its skull was cleaned 

 I could not believe that it had been correctly placed in that 

 genus ; but its cranial characters confirm Dr. Allen's judgment 

 in the matter. 



It was at Santo Domingo that Mr. Simons found ^Ir. Keays 

 in residence, so I presume that it was there he collected the 

 specimens described by Dr. Allen. 



Ojrymycterus mimus, Thos. 



Limbane. Simons (as above). 



Akodon caliginosus, Tomes. 



Marcapata. Kalinowski. 

 Santo Domingo. Simons. 



Also sent by Mr. Simons from Maj)iri, across the frontier 

 in Bolivia. 



Akodon bolivtenst's, Meyen. 



Limbane. Simons. 



This is the common olive Alcodon of all the highlands of 

 S. Peru. 



The type locality is not in Bolivia, but near Mount Misti, 

 Dept. Arequipa. My A. mollis is its lowland representative, 

 and may peihaps pass into it. 



Ann. d- Mag. S. Hist. Sen 7. Vol. vii. U 



