HETEROGEOMYS. 325 
6%. Heterogeomys. Distinct Pocket Gophers. 
1 es 
I Died 
Heterogeomys Merr., Mon. Geomyide, N. Am. Faun., No. 8, 180s, 
p. 179, pls. and figs. Type Geomys hispidus Le Conte. 
Skull high, narrow; zygomata moderately. wide; frontal broad 
and flat; orbital plate of frontal usually perforated by a foramen 
above apex of sphenoidal fissure; nasals much arched anteriorly; 
squamous part of occipital plane high above mastoid bulle; orbito- 
sphenoids narrow and long, not articulating with alisphenoids; upper 
Fig. 61. HETEROGEOMYS TORRIDUS. 
No. 5843 Field Columbian Mus. Coll. Nat. size. 
