AMERICAN AMPHICCELIAN CROCODILES ii 



equal size of a longirostrate form from the Hailey shales. Other 

 smaller humeri are present, nearly complete. They are slender and 

 nearly straight, the lower extremity scarcely differing from that of a 

 modern alligator or crocodile. The distal end of a tibia and its distal 

 face are shown in Figs. 6 and 7. The proximal and distal ends of two 

 large coracoids are shown in the figure. I have outlined the connecting 

 part between them as would seem natural. The distal extremity is 

 also noticeable for its moderate expansion. 



The numerous vertebrae preserved are of various sizes and from 





Fig. I. — Coelosuchus reedii. Right ilium, one-half natural size. 



various places in the vertebral column. A cervical (Fig. 8) has its 

 extremities almost amphiplatyan; the hypapophysis is small; the 

 parapophysial articulations are not large and are situated near the 

 end. The neurapophyses are attached by a loose suture. The length 

 of the vertebra is 50"^"^; its width, 44™"^. A dorsal centrum, of 

 which the anterior articular surface is shown in Fig. 9, has a very 

 smooth surface exteriorly, and is but gently concave longitudinally. 

 The posterior central articular surface is nearly flat, the anterior 

 rather deeply cupped. The length of the centrum is 59 ^'^\ its width, 

 50 '"'^. Another centrum (Fig. 10) is much more compressed from 

 side to side, presenting a vertically oval figure at the ends and in 

 cross-section. This centrum has a length of 50 ^"^ and a width of but 

 36 "^"^. The largest (dorsal) centrum preserved has a length of 65 "^™ 

 and width of 70™"^. 



