lO KANSAS UNIVERSITY QUARTERLY. 



Scapula. (Plate V, fig. .'?.) 



The scapula-precoracoid is preserved complete, and shows but 

 little distortion or compression. The humeral neck is moderately con- 

 stricted, and is longer relatively than in Protostega. The two ex- 

 tremities are flattened oval in cross-section near the base, with 

 rounded margins. The precoracoid is shorter than the scapula, 

 and is flattened and a little dilated at the distal extremity. The 

 scapula is slightly widened distally, and ends in an obtuse point, with 

 two shallow emarginations before the tip on the inferior border, and 

 one on the upper border, separated by rounded prominences. The 

 angle of the scapula with the precoracoid is a little less than a right 

 angle. 



Width of neck 42 mm. 



Width of articular extremity 56 



Length of precoracoid to inferior border of scapula 82 



Width of precoracoid distally 34 



Length of scapula to inferior border of precora- 

 coid 158 



Greatest width of scapula distally 32 



Least width of scapula 27 



Distance between extremities of scapula and pre- 

 coracoid 175 



Thickness of precoracoid at proximal end 9 



Ooracoid. (Plate V. fig. 1.) 



The coracoid is a remarkably short bone for so large a turtle. The 

 single bone preserved, of the right side, lies immediately above the 

 precoracoid and below the carapace. Its articular end is thickened, 

 with a thinner expansion for articulation with the scapula. The 

 scapular border is deeply concave, the distal extremity thin and mod- 

 erately expanded. The outer border, except proximally, is wanting, 

 but from the thinness of the border at the extremity, it appears to 

 have been nearly straight. 



Length 100 mm. 



Width at proximal end 35 



Width of shaft (approximately) 18-20 



Humerus. (Plate IV.) 



The humerus is a very large, flat bone, intermediate in some 

 respects between that of Protostega and that of Chelone, but with a 

 narrower shaft than in either. Both bones were originally present, 

 but unfortunately the left one is represented only by fragments. 

 The distal end is shaped very much as in Clielone, save as already 

 stated that it is more constricted above, below the radial process. 

 The radial process is even larger than in Protostega, though not 

 reaching as far down the bone. The ulnar process, on the other 



