"E ad 
iY 
1885.] The Amblypoda. 43 
The resemblance of the feet to those of Coryphodon may be 
readily seen by comparing Fig. 25 with Figs. 1-2 (p. 1110, Vol. 
xvii). The characters of the component parts are quite iden- 
tical. 
Professor Marsh has given us a figure of the cast of the brain 
chamber of the Uintatherium mirabile Marsh. It displays most 
striking peculiarities. These are: (t).The small size of the hemi- 
spheres; (2) the difficulty of distinguishing the cerebellum from 
the surrounding parts; (3) the large size of the olfactory lobes 
(Fig. 26). In all these respects there is a great resemblance to 
the brain of Coryphodon (Fig. 13). The hemispheres pass into the 
olfactory lobes by a gradual contraction of their outlines, They 
rise higher than, and 
then descend posteriorly 
towards the mesenceph- 
alon and cerebellum. 
The latter parts, as in 
Coryphodon, are not 
distinguished in the cast. 
The hemispheres are 
not convoluted, nor is 
there any sylvian fis- 
sure, according to 
Marsh’s figures. This 
brain, as remarked by 
Marsh, is the most TEP- Fic. 26.— Uintatherium mirabile Marsh, brain’ 
tilian among the Mam- one-third nat, size. From Marsh, Amer. Jour. Sci 
Arts, Vol. xt, PL ty 
malia. One of the 
strongest confirmations of this statement, is the small size of the 
cerebellum. 
Owing to the imperfect character of the material which I have 
had the opportunity of examining, it is not possible to state the 
number of genera with absolute certainty. There are certainly 
three of these, and probably four. So far as present knowledge 
goes, they pertain to one family, which I have called the Eoba- 
siliidæ. The three genera mentioned differ in the forms of the 
mandible; the fourth has certain cervical vertebre of a peculiar 
form, but the form of the mandible is unknown. I can only con- 
trast the genera as follows: 
