230 MEMOIRS OF THE CARNEGIE MUSEUM. 
limbs and pelves of both male and female individuals. To this species the writer 
has applied the name of M. petersoni. It is apparently the same animal to which 
Professor Barbour (J. ¢.) applied the specific name parvus. 
6. M. (?) maximus sp. nov. (?). 
In Quarry No. 2 Mr. W. H. Utterback recovered with other material a very 
large scapula. The scapula is designated in our Catalog as No. 1776. 
It greatly exceeds in size the scapule of fully adult specimens of M. elatus; the 
posterior border is sharply angulated above the middle, and not rounded as in 
M. elatus and M. peterson; and the tuberosity of the spine is most broadly developed 
at its lower extremity, whereas in the two last mentioned species, this tuberosity 
is enlarged about the middle of the spine, presenting a wholly different facies, as 
may be seen by comparing the figure (see Fig. 77) with that of the scapula of 
M. elatus on Plate LXV. In view of its great size, and the features to which we 
have just called attention, we are led to think that we are dealing in the case of this 
bone with an animal which must be regarded as at least specifically, if not generic- 
ally, distinct from the others which have been studied. We hesitate to found a 
species, much less a genus, on a single bone, but nevertheless we have caused this 
specimen to be figured (see Fig. 77), showing its peculiarities, which may assist 
future students in identifying similar material should it be recovered. It has been 
suggested that this large scapula does not represent a new species, but belonged to 
a very old male in which an enormous development of surfaces for muscular attach- 
ment had taken place, though most writers would, we think, be inclined to the opinion 
that the theory of a specific difference should hold good. Should later discoveries 
prove the truth of the latter view, the species may be designated as Moropus maximus. 
It is, moreover, possible that this scapula does not represent Moropus at all, but some 
animal more nearly related to the Titanotheres. The entire absence, however, of all 
other material representing the latter family in these beds gives much occasion for 
doubting such a reference. It would be indeed singular that among the thousands 
of bones gathered from these beds the only representative of a Titanothere should 
be a shoulder blade, and that it should occur so high above the Oligocene. 
7. Moropus matthewi™ sp. nov. 
Type: Various foot bones and an upper molar tooth, Nos. 9076-8, 9080, 9368, 
Collection of the American Museum of Natural History, New York. 
Geological Horizon: From near Pawnee Buttes, Northeastern Colorado (Pawnee 
Creek Beds, Middle Miocene). 
18 The specific name is applied in honor of Dr. W. D. Matthew, of the American Museum of Natural 
History, who discovered the type. 
