1884] The Amblypoda, 1117 
we us now compare the superior molars of Pantolambda (Fig. 
p a agi of Coryphodon (Fig. ga). The two external Vs of 
hp rare represented in the latter by a cusp and a partial V, 
si a aA ridge on the external half of the posterior 
“8 ooth. This arrangement is already imitated on the 
molar of Pantolambda, where one of the Vs has disappeared 
and the one that remains is very oblique. ; 
Prd pain V ee its form better in the superior molar 
age e ratus (Fig. 9f); while in the genus Metalo- 
94 se it is reduced to a cusp, forming the inner extremity 
va ron e Hiri (A figure of this genus will be given in the 
saioak of the NATURALIST.) The interior V of Panto- 
opte = DEP by a corresponding angle at the inner side 
ie aio sso oryphodon (Fig. 9 a), and the two ridges which 
rO e external base of the crown are well marked. 
Teo ere is developed on the anterior side of the base 
rong cingulum. This is 
wane on the posterior side, 
but is present in a feeble form 
in Pantolambda (Fig. 3). I have 
Sometimes called these the su- 
perior and inferior anterior. cin- 
gula respectively. In Corypho- 
don the posterior superior cin- 
eae is unsymmetrically 
ni rf x saf its _ end, and D> ! l Ti N ae 
on it devel Tae | YDA 
cusp at this point, the pa I S N > ; 
thus becoming quadritubercular _ F's. 10,—Dinocerata teeth, one-fourth 
(Fig. 9 f). nat, size. Upper figures superior molars 
oh on gy el meg ey 
Pa? iip compare these of thw ut tipinio represented in 
pon ae those of Uintatheri- fig. 8. From Osborn, memoir on Uinta- 
g. 10) we have little diffi- “*""™ aad Losier 
ase determining the presence of the two anterior cingula. 
kac culty is to ascertain the homology of the posterior trans- 
: crest. It is difficult to see in it the two external Vs of 
Panto! ; 
antolambda confluent into a simple ridge, yet such it seems » 
rison with the figure 
