Oct. 1901. THE Fore Lec or Morosaurus—RIGGs. 279 
Measurements of foot, Mus. No. 6641, compared with published 
measurements of the American Museum specimen No. 332 are as 
follows: 
Am. Mus. 
No. 6641. No, 332. 
M. M. 
Length of Metacarpal I, AMR STOR ts ETN RM Bley 0 205 
Depeivo piemearpal ll, . .. . %. . .'). .? .288 .250 
emer creamcortpal Ll ao. ee As a 288 250 
DemerrmimreetacarDab lV, hiah 9 ek os 2 2269 235 
Benet penectacatpal Vy) sw Te ew BAS 205 
Dengurmasnigualr Digit, oe. ef... gO ee 
A second coraco-scapula of considerably smaller size is even more 
distinctly of the Morosaur type (Pl. XLII, Fig. 1). It was also col- 
lected by the Museum Expedition of 1900 from the upper Como beds 
of the Grand River Valley, but came from a horizon fully one hundred 
feet above that of No. 6668. The specimen is splendidly preserved, 
as the photograph shows, and is complete in outline save a small por- 
tion of the upper end, which was distorted by crushing. The two 
bones are firmly ankylosed at the coraco-scapular suture and bear 
" every evidence of having belonged to an animal fully adult. Its form 
as well as that of associated vertebre at once identifies it with IZ 
grandis. 
The blade of the scapula is somewhat broader in proportion and 
the neck sherter than that of the type specimen. The superior 
margin of the blade is produced into a hook so thin as to be usually 
broken away and lost, but it has been observed in other well- 
preserved specimens. The postero-inferior border at the constriction 
is likewise produced into a thin prominence. ‘The coracoid is propor- 
tionately larger and its junction with the scapula is marked by only a 
slight indentation in the superior border. The opening of the fora- 
men on the lateral surface is directed’ downward in line with the 
scapular axis. An anterior view (Pl. XLII, Fig. 2) shows the natural 
curve of the scapula as well as that of the coracoid. The curve 
formed by their junction has been much reduced by crushing, as the 
opening of the suture on the mesial surface shows. A fine series of 
cervical and dorsal vertebre, belonging to this specimen but still in 
the matrix, may add important data to our knowledge of the vertebral 
column in this genus. 
Measurements of coraco-scapula, No. 6670: 
: M. 
Coraco-scapula, total length with curve, . .. . . . . « 1.405 
MAMMOTH IRD CLIEV Gre). 1 ste ar he laced sia KLO45 
Scapuls, ereatest breadth of blade,” ~ ...% 0 sere 0 we 625 
