IT'2 TJk Ann r'icdii (jedliXjisf. SppttMulier, isni 
rallRT broad posteriorly ( B. C), and liradiiallv (•ontractiiig an- 
teriorly ( B ) to the greatl}' produced, liiirli. and narrow muzzle 
( A. \\). The froirto-parietal region is but moderately elevated, 
and slopes either way from the ol)tuse median ridge ( B, C ). 
There is a rather large elliptical or narrow-ovate parietal foramen 
( B. C ). The orbit is large and ovate ( B ) in outline. The 
mandible has a long symphysis ( A. B ). posterior to which the 
rami are quite straight till at and near the posterior end. Avhere 
they curve inward ( B ). The teeth ( A, B) resemble in form and 
sculpture that to which Leidy has given the name. PirafositnnisX^ 
l)ut are smaller and less curved, and their strijeform folds of 
enamel reach much nearer the summit and are lacking entirely on 
the antero-exterior segment (A, B). 
The Pectoral Arch. — The coracoids are divided into a stout, 
saddle-shaped, anterior segment, and a thin, scoop-shaped pos- 
terior segment b}* two broad foramina which are either conlluent 
anteriorly across the s^-mphysial axis or separated by only a nar- 
row sj'mphysial prolongation of the posterior segment. The 
anterior segment is thickened in the interglenoid axis as an 
opposed pair of deep, massive abutments whose symphysial faces 
are marked with l)road pits for the attachment of a median cushion 
of cartilage. It is anteriorly produced in advance of the glenoid 
fossae and is posteriorly limited l)y the abrupt recession of the 
inner coracoideal borders from the symphysial axis at the foot of 
the steep posterior slope of the abutments. The thus formed 
inner-posterior angle of either abutment presents a complex in- 
wardly directed articulation ditticult to describe, but which, 
viewed from the slightly concave dorsal side of the abutment, 
presents the appearance of two short processes, the posterior of 
which is pedicellate. The posterior segment of the coracoid is 
characterized, like the anterior, by a transverse thickening culmi- 
nating at the symphysis, l)ut shallower than that of the anterior 
segment. It crosses the anterior end of the segment. While 
tliis posterior segment, as a whole, is concave upward, the trans- 
verse thickening is concave below and convex upward, reversing 
the conditions which obtain in the thickening of the anterior 
segment. The pre-glenoidal processes of the coracoids are long 
and blade-like, but are so broken in the type-specimen as not to 
JCret. Kept, of U. S. 
