806 Osborn and Speir—Lower Jaw of Loxolophodon. 
Measurements of the lower jaw. 
Extreme length from infra-condylar depression to symphysis 295 
BPG OG AS UNE DOOM as oe as sees bane <i ec nme 
Internal depth of jaw at posterior edge of symphysis- .--.- O71 
Teeernome Or TOW BG BG Coe ae a eae 014 
26 Wiest me GOR PROMO lS. sis. 
The molar series (fig. 2) display three transverse crests, the — 
anterior the most prominent, and forming with the second an ~ 
open angle, with the apex directed inward; the posterior crest 
less prominent than the other two, is serrate throughout the — 
series. A cingulum, faint elsewhere, is quite strongly devel- _ 
oped at the edges of the third crest. Just beyond the inner | 
apex of the middle crest is a large accessory tubercle which is — 
constant on the true molars and last premolar inclusive. 
Beginning the detailed description with the last molar, for it — 
has the characters of all the others in strongest development, 
we find it is by far the largest of the series. The posterior — 
crest attains its greatest elevation at the center. The middle 
orly in a prominent and exteriorly in a lesser tubercle. 
The second molar presents the same characters as the last, 
but is greatly reduced in size; this disparity is more marked 
here than it is between any two of the other teeth, The first 
molar is so much more worn that it fixes three as the number 
of he molars without doubt. 
n the premolar series the anterior crest is relatively more — 
prominent and its terminal tubercles become equal in size. 
€ canine incisor series—Owing to the fragmentary state of 
pe 
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In his pamistek “On the Short-Footed Ungulata,” (Proe. 
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