_Mixodectes_, Cope, Proc. Amer. Phil. Soc., p. 447 (1883); id., Rep. U.
S. Geol. Surv., iii., p. 240, pl. xxiv. f, figs. 1 and 2.
The members of this genus, founded on fragmentary mandibles from the Puerco
(Lower Eocene) strata of New Mexico, have a large front tooth "issuing from
the ramus at the symphysis like a rodent incisor, the second tooth being
similar but smaller and posterior and external to the first." The genus is
represented by two species, M. PUNGENS, Cope, and M. CRASSIUSCULUS, Cope.