XENOMYS. 291 
Xenomys Merr., Proc. Biol. Soc. Wash., vil, 1892, p. 160. Type 
Xenomys nelsoni Merriam. 
Sulla 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. 45286 U.S. Nat. Mus. Coll. Enlarged % 
