Tz.nnoeyon and Hypotemnodon. — Eyerman. 279 
first and second of digit V. The most strikingly characteris¬ 
tic feature of the foot is the very extraordinary development 
of the hallux, the first or uppermost phalanx having a length 
of 40 mm., about one-half the length of the first phalanx of 
the median digit; it also articulates in a different plane (as is 
generally the case) from digits II-IV: the bone is slender and 
cylindrical and the lower end curves inward toward the second 
digit. The second is slightly more robust than the fourth and 
has a flat upper articular surface with squared edges and does 
not, as in the living species, curve away from the median ; this 
latter is of the same length as the fourth, but more robust, with 
its internal side curving toward No. II. The fifth articulates 
in a different plane from those of III and IV and from that of 
the same digit in C. familiar is and extends considerably above 
the line between the cuboid and the fourth, articulating upon 
the lateral surface of the former; it is slender and curves 
away from the cuboid to a greater extent and the lower one- 
half is somewhat more separated from No. IV than in C. 
familiar is. The second phalanx is present*and measures 22 mm. 
Cants familiar is of approximately the same size as Temno- 
cyon ferox of about 75 cm. in height has been taken for com¬ 
parison with the latter, as has been seen above, for in many 
respects the latter species approaches nearer this species of 
Temnocyon. We have noticed that the body of T. ferox is 
perhaps somewhat longer, with more elongated cranium, and 
that the limbs are shorter, this shortening not occurring 
throughout the entire limb but principally in the radius and 
ulna of the fore- and the tibia and fibula of the hind-limb. 
Then too another very marked difference is the unusual, de¬ 
velopment of the pollex and hallux. 
Whether T. josephi and T. wallovianus are true Temnoeyons 
or whether they should be removed to the new genus Hypo¬ 
temnodon , as hereafter described, can only be determined when 
the mandibles of these species are discovered, at present only 
the upper jaw being at hand. 
Comparison with Daph^nus, Leidy. 
In the genus Daphcenus the teeth closely resemble Cants, but 
with three superior true molars. Femur has a third trochan¬ 
ter. Feet plantigrade and pentadactylate. Distal end of 
humerus with a foramen. Auditory bulhp apparently in two 
