280 Fietp Co_tumpian MusrtumM—GeEotoecy, Volt. I. 
M. 
scapula, greatest breadth of upper end, (2... 234° teu see eee 
scapula, least breadth at constriction,.; (4.9; 2 me te ce 
Coracoid, greatest breadth, . . . > Se ie ce me ae 
Coracoid, breadth from suture to inegeies Gerace a REN ee 
A much larger species of Morosaurus is represented by a well pre- 
served coraco-scapula, a tibia, an ilium and a number of caudal verte- 
bre in the Museum collection, and a femur and fibula, in the’ collec- 
tions of Kansas University, all from the Freeze-out Hills of Wyoming. 
The scapula and coracoid are firmly codssified (PI. XLII, Fig. ae The 
former is longer in proportion to its breadth than any other specimen 
of this genus examined. In outline the blade is rounded at the 
antero-superior border and with the coracoid forms a deep notch at the 
suture. The coracoid is likewise rounded in outline from the suture 
to the hp of the glenoid cavity and is deeply concave on the mesial 
surface. 
Owing to the fact that this specimen was found in a general 
deposit where members of several species were heterogeneously asso- 
ciated, it is impossible to determine all of the parts belonging to this 
individual. The parts of the front and hind legs known show that 
they belonged to an animal much larger than any Morosaur yet 
described. But as it is not desirable to further encumber the litera- 
ture with useless synonyms, this specimen will be provisionally 
referred to AZ. robustus. 
It is noticeable in the coraco-scapule of this genus that the 
smaller adult specimens are broader in proportion and have their 
upper ends less produced. With regard to these proportions, it may 
be said that they grade quite evenly from the smallest to the largest 
specimen described. It is also worthy of note that of the three 
coraco-scapule figured, all are coéssified.. While this cannot be re- 
garded as indicating anything more than adult age, it does indicate 
that codssification of the scapula and coracoid is common in the adult 
of this genus. A considerable variation in the outlines of the two 
bones in the region of the articulating border may thus be accounted 
for. In the young animal the coracoid is rounded at the angles; with 
the ossification of the connecting cartilage these fill in until there is 
but little indentation of the blade at the sutural line. By this process 
the coracoid not only increases in size, but the antero-superior angle 
becomes more produced. 
