some South- American Muridae. 143 



Incisors stronf^ly find clearly f^rooved. Premaxillo- 

 niaxillary suture bowed forwards below. 

 Type as above. 



Other species : — 



Eitncoviys fossorj Thos. (Reitln'odon fossor). 



,, vwrddx, Thos. 



„ petersoni, All. 



AuLiscoMYS, Osgood, 1915. 



Tail medium or rather short. Palms and soles naked. 

 Incisors faintly or not grooved. Premaxillo-raaxillary 

 suture mainly vertical. 



Type. E. \Auliscomys) pictus {Reithrodon p ictus j Thos.). 



Other species : — 



Euneomys (Auliscomys) holivienais, Waterh. (Pkyllotis 



boliviensis) . 

 „ „ „ flavidior, Thos. 



[Pkyllotis h. flavidior), 

 „ „ decoloratus, Osgood. 



„ „ micropus, Waterh. (Mus micro- 



pus) . 

 „ „ sublimis, Thos. {Pkyllotis sub- 



liniis). 

 „ ,, xant/iopygus, Waterh. [Mus 



xanthopygus). 



G.u:.EN0MYS, subgen. nov. 



Tail very short, barely 1\ times the length of the hind 

 foot ; palms and soles partially hairy. 



Zygomata especially widely expanded anteriorly. Naso- 

 frontal region flattened. Zygomatic plate slanting, not 

 ])roiected forward above. 



Incisors narrow, much thrown forward, not grooved. 



Type. Euneomys (^Galenomys) garleppi ( Pkyllotis garleppi, 

 Thos.). 



The striking external appearance of ''Pkyllotis " garleppi^ 

 recalling tiiat of OnychomySj always appeared to indicate 

 more tiian merely specific distinction from other members of 

 the group ; but upon only a single specimen with imperfect 

 skull I have not hitherto ventured to separate it. It is, no 

 doubt, most nearly related to E. {Auliscomys) boliviensis, but 

 may be distinguished by the characters above noted. 



