85 



rior are subtriangular ; and the rib-pits on the first dorsals are subround or 

 vertically oval. Thus, the heads of the ribs also vary. The shafts arc all 

 flat, probably partly from pressure. They are frequently curved in the direc- 

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

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

 well-defined distal extremity of a rib can be made out; nor have anything like 

 abdominal ribs been preserved. 



The scapula?- arch is remarkable for its large clavicles (or procoracoids). 

 As preserved, the latter are quite convex downward, both antero-posteriorly 

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

 The clavicles have a remarkable external flat projection, which is separated 

 from 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 processes 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 posterior face at this point. 

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



Measurements. 



Inches. Lines. 



Greatest antero-posterior length of the scapular arch 33 G 



Greatest antero-posterior length of the clavicle 14 'J 



Greatest antero-posterior length of the glenoid cavity 6 9 



Greatest antero-posterior length of the precoracoid cavity _ 7 3 



Transverse extent of the clavicnli '27 



Transverse extent of the coracoidca 16 



From the acetabulum to the foramen 7 6 



The form of the posterior margin of the coracoidea is unknown, and they 

 are much broken on the inner margin. 



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



obliquity of the median suture, and from the form of the pubes, as they are 



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



formed a boat-shaped support to the abdominal viscera, with an obtuse keel 



on the median line below. 



Measurements. 



Inches. Lines. 



Greatest antero-posterior length of the pubis and ischium 25 



Greatest antero-posterior length of the pubis 13 G 



Antero-posterior median length to the notch of the iscbia. 7 



Length of the coracoids behind the notch 4 6 



Greatest width of the pubes 27 G 



Greatest width, of the isohia 21 



