1s71.J 81 
[Cope. 
Long diameter of (Fig. 6) black super. molar ........-.. 50s sees 021 
Short ‘ i . loa Wo Res tenleee pies .015 
Long sf (Fig. 9) light, Ma Biv yots akan tek 0215 
Short et me SS Le er eer ee 0158 
Total length i ee ys ens HS .062 
Long diameter 4 super. molar of (Fig. 6).........-.+ +e see ences O17 
Short ee Me Me qeistea ad Jia. oo Wea eatnn cata 011 
Long ve ¢ (igs O) ie ie ee ae 018 
Short ve ve Oe Ra oka eae ee PA .0129 
Long - inferior molar GiGhh) ioe i tee ae 0228 
Short a a ee eras Sec ae 015 
engi * Ra (IGOSE) oe eee ek 0214 
Wadth,, © be ta ec ie ie online an eae 015 
There are vertebra of both adult and young animals. An axis is much 
like to that described by Leidy in Megalonye jeffersonti. The centrum is 
much depressed, with a strong inferior keel. The articular faces of the 
lateral abutments and of the odontoid process are continuous. This pro- 
cess is short and conic, and is a continuation of a projection of the cen- 
trum, which is notched on each side above, at its anterior limit, for the 
annular ligament. A more posterior cervical, with codssified epiphyses, is 
much less depressed, and is about as broad as long. A caudal, with co- 
ossified epiphyses, has subround articular extremities, and is remarkable 
for the extent of the chevron articulation of both ends of the inferior 
aspect. These are connected by a lateral ridge which encloses a deep 
fossa. 
Measurements of Vertebra. 
M. 
GD Weaontem atheyyen Gr corn CeO ye On oy paces 0.089 
Greatest, WIGGh so) gis ck oes (othe, Os 1s es ce 096 
PVOUM GAN sc se ce ees es 5 ei ee tee ea 0385 
Width centrum behind... .......- 60+. 2 1e. cer ee es stent tt seen 044 
Depth Oy le es Petes os Fo es 2? .028 
dere thy POSter. CONVICAL, .t00 55s ca cts est eee. ee ees 2 ta oat 054 
Width . GUPICU AE TACO ne ve ess re ees siege age Oe 0565 
Depth - ee ees er 05 
Teugh Caudal i. i sisi eee ee setae eye ete ke eS 052 
Width ‘ MPICCUAE TACO. soe a cos ou sus ced Vee eo ce mers ees 057 
Depth ** Be ie ght MEO A ay ee ee eta es 05 
bs es young, larger animal, with separate epiphyses..... 083 
" articular face, dorsal of young......-.. see eee eee e ee eens 05 
Width Me ee et oe .062 
Length centrum of UE ee ee eel 0455 
The carpals do not present marked difference when compared with 
those figured by Leidy under J. jeffersonii. Among the tarsals, one as- 
tragalus is exactly like that of the latter species; another is deeper and 
shorter, viewed from the inner side, with vertical truncation below in 
AvP 8 VO. x Kk 
