Genus Tt'Jnaci'fnnei'niji. — Ciajjin. 1T3 
show their full length and outline. But on the block of stone 
bearing skull C ( and which bears vertebra? indistinguishable from 
those of Ti-innci-omri-itm) WvaxQx^ a perfect pair of anterior cora- 
coideal blades. These lie mostly posterior to the skull and are 
directed agreeably with it. l)ut their anterior end rests upon the 
posterior parts of the dorsal surface of the parietals, the skull 
having been accidental!}' turned over. These blades are about a 
foot in length and rather more than half an inch thick along the 
straight inner margins, diminishing, except near the end, to a 
thin outer edge. They gradualh' diminish in breadth ( to two 
and one-eighth inches each ) in the proximal two-thirds of their 
length, beyond which they have moderate lateral expansion. 
The distal parts of the ventral plates of both scapulo-precora- 
coids are likewise preserved on the parietals of skull C. They 
are flat expansions, somewhat broader than those of the distal 
ends of the anterior coracoideal blades, Avhose outer borders they 
meet on either side in a straight articulation two or three inches 
long, being thus held some five inches apart, instead of meeting 
in the mid-line as do those of Clmoliosdiirux. This articulation 
includes nearly the posterior half of the obtuse-angled extremit}' 
of the scapulo-precoracoid, the remainder of the extremity form- 
ing (as preserved) a free antero-exteriorly directed border which is 
squared like those of the articulation, and which may, therefore, 
have joined an omosternum placed anterior to the coracoideal blaaes. 
The stout, extero-posteriorly directed end of the left saipnJo- 
jjrecoracoid remains, in the type specimen, in natural relation to 
the coracoid, which it joins to form the glenoid fossa. 
A large and elongated fragment of the middle part of the 
former bone presents three faces: one concave, the others repre- 
senting the outer aspect of the ventral and dorsal ( precoracoid 
and scapular ) plates, nearly flat and making a rounded angle of 
about 100° with each other. 
The Pelvic Arch. — Of this, there are preserved in the type- 
skeleton the perfect right and imperfect left ilium, the greater 
part of the right pul)is. the acetabular extremities and necks of 
both ischia, and part of the right ischial blade. On the right 
side, the union of the ischium and puljis, and on the left, that of 
the ischium and ilium remain undisturbed. The ilium is a clavate 
bone, rudel}' elliptical in cross-section of the shaft, and having 
the much enlarged lower end bent inward and forward. 
