XENOMYS. 



5ti. Xeiiomys. 



291 



Xenomys Merr., Proc. Biol. Soc. Wash., vn, 1892, p. 160. Type 



Xenomys nelsoni Merriam. 



Bullae large, elongated, and parallel to axis of skull; vertical ridge 

 on anterior border of squamosal; this last terminates between pos- 

 terior root of zygoma and occiput; paroccipital processes long and 



FIG. 47. XENOMYS NELSONI. 



No. 4^286 U. S. Nat. Mus. Coll. Enlarged 



