226 ^Ir. O. Thuina.s oti 



This animal looks like a larrre Phyllotis or soft-liaiied Ory- 

 zomys^ and it is not until its liypsodont complicated teeth are 

 examined that its peculiarity appears. In tliis respect it 

 differs from its ally ChinchifluJa^ whose external appearance 

 is as striking as its teeth. 



7. Euneomys sublimi's, Thos. 



(J ? . Livichuco, 4550 m. 



Like Ctenoiuys opinus and Phyllotis holiviensis this species 

 ranges north-westwards from the present locality to Caylloma, 

 Peru. 



8. Alcudon albiveiiter, Thos. 



2 c? , 1 ? . Ohallapata, 3750 m. 

 7 J, 3 ?. Potosi, 4400 m. 



J ? . Uyuni. 



9. Akodon Berlepsclii, Thos. 



3 ? . Pampa Aullaga, 3800 m. 



AVidely as the original specimens of -4. aJbiventer and Btr- 

 hptic/n, from Cachi and Saliania respectively, differ from each 

 other, a study of the present series shows that they are more 

 nearly allied than 1 had supposed. Unfortunately the majority 

 of the new specimens are in more or less bleached j)elage, and 

 it is only where patches of fresh fur are present that the proper 

 colours can be observed. Of the three from Pampa Aullaga 

 one only has fresh fur, and that only on the anterior two 

 thirds of the body ; but so far as this goes the agreement 

 with the type is exact, and these epecinuns should no doubt 

 be referred to A. Berlepscln. But the difference betweeii the 

 two forms narrows itself down to a question of the shade of 

 grey — clear dark cinereous in Berlepschi, lined isabella in 

 o/biventc}' • and in the series of the latter there are such 

 ap))roximations to the former, that it is by no means im- 

 probable that the two will be found to intergrade completely, 

 in which case A. Berlepschi will have to be considered as a 

 subspecies of A. albiventer. 



10. Ahodon Spegazzimij Thos. 



<J. Lagunillas, 4000 m. 



2 (J, 1 ? . Potosi, 4300 m. 



More olive and less rufous than the type, from Cachi; but 

 the ijict that that had been skinned out of sjjirit would account 

 for the difference. 



