oe 
Cope.] 534: [Jan. 18, 
trace of cingulum on the superior molars is on the inner base of the ante- 
rior lobe, where it is weak, and in the interspace between the internal 
lobes, where it is a narrow tubercle. Enamel obsoletely vertically striate. 
It is wanting on the external side of the internal crescent, as Leidy has 
shown to be the case in certain species of Merychyus. The fifth lobe of 
the last inferior molar is well developed and has its two crescents separated 
by a groove. The adjacent horns of the external crescents are of about, 
equal length. No cingula, except a trace on front and rear of crowns, and 
a tubercle between the bases of the external lobes. The fourth premolar has 
two fossi isolated, one anterior to and the other posterior to the principal 
apex, which is double, and anterior to the middle. Before wear, each of 
these fossee opens inwards. The crown of the third premolar has its inner 
face unequally divided by a crest behind the middle. Posterior to this 
the space is occupied on the inner side by two shallow fosse of which the 
‘posterior is the narrower, Anterior part of inner face of crown concave. 
One principal angular cusp. The second premolar has a compressed 
triangular crown with a long base, and a weak vertical ridge on the in- 
ternal side. The first premolar is a very robust tooth with a straight 
posterior border directed at 95° forwards, and is vertically truncaté in the 
specimen by friction with the canine. Section of crown lenticular, 
rounded in front. r 
Measurements. M. 
INO: 1) 
Length from occipital condyle to postglenoid process... .049 
“N o i ul ‘« postfrontal process... .135 
Width of occiput at posttemporal crests, .............. 054 
" re TE COMOV ICR ts Vee nse seer e eet hes «LOS 
Elevation of occiput above foramen magnum.......... .084 
Length from foramen magnum to palatal border. ...... .060 
Width between apices of otic Dull@.'.....0... cece eens O42 
Length from inferior m. iii to apex of coronoid process. .075 
i of superior true molar serlés, +. 6.0... ese ve 084 
Dinnvetancset i{ scored nea por Og Foul ce taba by -026 
transverse (at middle trib) ..........0. .085 
( AMLELOPOBUCLION, pe vecds is cials view ey vin) USe 
Diameters m. iii ' ; 
(transverse (at*middle rib). .......... .025 
Length of inferior true molar series. .... ......... vey OSD 
: anteroposterior, ..... PVE W ah eh a vied .0205 
Diameters P-m, iv { ni Hl vind ag 
transverse behind. ..... rie ou ipa arian vl a, 
t anteroposterior ...... Mew veelode as ewe wOee 
Diameters m, i / #2teroposterior O28 
KOPAHEVOLSG ilu Cokin e tubule yeu vei i ielew Out 
Fi He LLUCLOPOBUCILON ss isiin cu ec Chae sce 
Diameters m. iii { 224T! SRLCTIOE 040 
WUMIBVOLEON GHGea les nhvueenineh oad MURe 
No, 2. 
Length of ramus mandibuli from incisive border to 
condyle (Oblique)! iii cee eee 
