116 ALLEN’S NATURALIST’S LIBRARY. 
Wood, from the Upper Eocene of Hampshire; M. EDWARDSI 
(Filhol), from Central France, a species larger than JZ, antiguus, 
presents dental characters similar to the Galagos and the Mouse- 
Lemurs ; M. PARVULUS (Filhol), and M. zirrei (Schlosser), are 
both from the Quercy Phosphorites of France; while M. 
ARMATUS is from the Eocene of Alsace, and M. (CryPpto- 
PITHECUS) SIDEROLITHICUS from the Bonerg of Frohnstellen. 
GENUS MIXODECTES. 
Mixodectes, Cope, Proc. Amer. Phil. Soc., p. 447 (1883) ; id., 
Rep. U.S. Geol. Surv., 1ii., p. 240, pl. xxiv. f, figs. 1 and 2. 
The members of this genus, founded on fragmentary mandi- 
bles 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 repre- 
sented by two species, M. PUNGENS, Cope, and M. crassius- 
CULUS, Cope. 
GENUS CYNODONTOMYS. 
Cynodontomys, Cope, Palzont. Bull, p. 151 (1882); id., Rep. 
U.S. Geol. Surv., 1i1.,,.p..243, pl. xxiv., fig. 2- 
This genus contains but one species, founded on several 
lower jaws disinterred from the Wasatch beds in the Big-Horn 
Bad-lands, in Northern Wyoming. The lower incisors, or 
perhaps, canines, are very large and close to the line of union 
of the two halves of the jaw; the molars have three cusps in 
front and a heel behind. The dental characters of the genus 
“resemble considerably those of Axaptomorfhus and LVecro- 
lemur |Microcherus|, but the large size of the inferior canine 
