194 MEMOIRS OF THE CARNEGIE MUSEUM. 
2103 Carn. Mus. Cat. Vert. Fossils) of a huge Moropus was discovered. ‘The 
specimen was slightly injured by crushing, and lacks the premaxillaries, but was 
the most perfect cranium of a chalicotherine animal which had thus far been found, 
SECTIONS 1-6 IN QUARRY NO. 1, 
SHOWING THE POSITION IN WHICH THE BONES OP MOROPUS 
ELATUS (CAT. NO, 1604) WERE FOUND. 
los 
Fic. 2. Sketch of location of bones of M. elatus (No. 1604). 
surpassing in perfection any specimen in the collections of either America or 
Europe. That it is the cranium of the large specimen the remainder of the skeleton 
of which had been recovered in the fall of 1905 and the summer of 1906 does not 
admit of a particle of doubt. The mandible found by Mr. Peterson in the fall of 
1905 exactly fits the cranium discovered in September, 1908. Had Mr. Utterback 
not reached his conclusion as to the barrenness of the rock so hastily he would 
have had the pleasure and honor of securing the skull of the animal for the recovery 
of much of the remains of which in 1906 we are indebted to him. 
In September, 1908, the writer again visited the quarries and spent some 
time in company with Mr. Peterson in the exploration of the region roundabout 
and in studying the geologic characteristics of the strata, which are here exposed 
to view. In the present paper these matters will not be referred to, except in- 
cidentally. 
The ‘Agate Spring Quarries,’ as they have been named by Mr. Peterson, 
are situated in the Lower Harrison Beds (Miocene) and contain a vast quantity 
of the remains of extinct mammalia many of which, before the specimens were 
