455 
FROM THE PLEISTOCENE OF THE PLAINS. 
crown ; in S. fUalis, it forms about one-tliird. The paracone is prominent, and 
is strongly convex on the external face. The metacone has a nearly straight edge, 
and its external face displays a shallow vertical groove near the middle. The long 
diameter of its base is 1-5 as great as that of the paracone. The crowns of the ex- 
ternal incisors are oblique, and slightly incurved ; they have robust cutting edges, 
which are finely serrate, and no basal lobes. The incisors 1 and 2 have small conic 
lobes at the base of the crown, which are well separated from each other at their 
bases. Those of I. 1 are subequal, while the external of 1. 2 is smaller than the 
internal, md nearer the base of the crown. The crowns proper of 1 and 2 are 
acutely conic with semicircular section, the posterior face being fiat. The edges of 
I. 2 are feebly crenate ; those of I. 1 are smooth. 
The raetacarpals represented are II, IV and V ; of these No. IV is best pre^ 
served. It differs from that of the lion in the smaller transverse diatneter of the 
head, and in the fact that the superior face of the diaclasfi is nearly continuous 
with the proximal or unciform surface. The shaft is quite as robust as that of the 
lion. The shaft of the fifth metacarpal is on the contrary more slender. Its section 
is a triangle with convex limbs, and the obtuse apex external. The piholanges have 
forms and proportions similar to those of the fifth digit of the lion. The second 
phalange is a little shorter’, and the margins display but small traces of the bases 
of the sheath, which has been broken off Otherwise the ungual phalange resem- 
bles that of the lion. 
Measuremexts. 
Diameters crowm superior canine 
Diameters crowm I. 3 
longitudinal ; 
transverse ; 
MM. 
22 
13 
80 
28 
12 
35 
Diameters superior carnassial | ygrtical 
rlimnpt.or of head of feinui ; 
Diameters superior carnassial 
paracone ; 
inetacone ; 
Length of phalange ? V, 1 
? Y, 2 
? V, 3 
40 
22 
15 
10 
11 
38 
24 
22 
U 
For explyuytion of this ^ 
of the Geological Survey of Texas, 1892, 
Report ofVwtebrate Paleontology of the Llauo 
