85 



rior are siibtriangular; aud the rib-pits on the first dorsals an; siibround or 

 vertically oval. Thus, the heads ol" the ril)s also vary. The shafts arc all 

 flat, probably partly from pressure. They are frequently curve<l in llic direc- 

 tion of the compression, which suggests a vertical head. They, however, arc 

 probably more or less distorted, and the plane of compression changed. No 

 wcU-dctined distal extremity of a rib can be made out: nor have anythin<T like 

 ai)dominal ribs been preserved. 



The scapular arch is remarkable for its large clavicles (or procoracoids). 

 As preserved, the latter are quite convex downward, i)olli antero-postcriorly 

 and transversely; while the coracoids are equally concave in both directions. 

 The clavicles have a remarkable external tlat projection, which is .separated 

 iioni the glenoid cavity by a deep sinus. The glenoid cavity is bounded by 

 an elevated ridge, which sends a branch along the claviculo-coracoid suture 

 to the precoracoid foramen. This foramen is relatively of small size, and is 

 longitudinally oval ; the two are separated by an isthmus composed equally 

 of ]irocesses of clavicle and coracoid. The coracoids are very thin, except 

 in a transverse portion, which extends across behind the precoracoid foram- 

 ina; a strong elevated rib extends across the [)osterior iiice at this point. 

 The outer margin of the coracoid is thickened, rounded, and slightly concave. 



Mea&uremGnts. 



lucbcH, Lines. 



Greatest antero-posterior length of the scapular arcli 33 <; 



Greatest autero-posterior leugth of the clavicly 14 ii 



Greatest autero-postcrior length of the glenoid cavity f> <) 



Greatest autero-posterior length of the precoracoid cavity 7 :i 



Transverse extent of the elaviculi t>7 



Transverse extent of the coracoidia K; 



From the acetahulum to the foramen 7 



The form of the posterior margin of the coracoidca is unknown, and tlicy 

 are much broken on the inner margin. 



The greater part of the pelvic arch appears to be preserved. From the 



ol)liqiiity of the median suture, and from the ibrm ol' the pubes, as they arc 



preserved on a large nodule of indurated clay, it is evident that they have 



formed a boat-shaped supi)ort to the abdominal viscera, with an obtuse keel 



on the median line below. 



McnsuremcnU. 



Inches. LllH-H. 



Greatest aDtero-posterior leugth of the pubis and ischium 25 



Greatest antcro- posterior leugth of the pubis 13 (', 



Antero-posterior median length to the notch of the ischia 7 



Leugth of the coracoids behind the notch 4 f, 



(ireatcst wiillh nf the pubPR v;7 (i 



Greatest wiillh of lhi> ischi.i 21 



