Pi-yrKRSON : Ostkologv oi' ( )xydaciylus. 475 



hori/on were obtained a rich and interesting collection, including the 

 material described in the present paper. 



The writer takes this opportunity of expressing his thanks to Mr. 

 Hatcher for valuable suggestions and criticism, and to Professor Os- 

 born for the free access given him to the various types and other 

 material, relating to the subject, in the American Museum of Nat- 

 ural History in New York City. 



The illustrations are from drawings made by Mr. Sydney Prentice, 

 the draughtsman in the Section of Vertebrate Paleontology of the 

 Carnegie Museum. 



Carnegie Museum, 

 October 1 6, 1903. 



Explanation of Plates. 

 Plate IV. 

 Fig. t. Side view of skull of Oxydactylm longipes, type (No. 918). 

 Fig. 2. Top view of same. 

 Fig. 3. Palate view of same. 

 Fig. 4. Mandible showing crowns of dentition. 

 All figures \ natural size. 



Plate V. 



Fig. I. Side view of atlas of Oxydactylus longipes, type (No. 918). 



Fig. 2. Side view of axis of same. 



Fig- 3- Side view of cervical 3 of same. 



Fig. 4. Side view of cervical 4 of same. 



Fig. 5. Side view of cervical 5 of same. 



Fig. 6. Side view of cervical 6 of same. 



Fig. 7. Side view of cervical 7 of .same. 



All figures \ natural size. 



Plate VI. 



Fig. I. Side view of first dorsal of Oxydactylus longipes, type (No. 918). 



Figs. 2, 3. Side view of dorsals, 6 and 7 of same. 



Fig. 4. Side view of dorsal 9 of same. 



Fig. 5- Side view of dorsal 10 of same. 



Figs. 6, 7. Side view of lumbars 4 and 5 of same. 



Fig. 8. Inferior view of sacrum of same. 



All figures \ natural size. 



Plate VII. 



Fig. I. External view of scapula of Oxydactylus longipes, type (No. 918). 



Fig. 2. Front view of humerus of Oxydactylus longipes, cotype (No. 886). 



Fig. 3. Posterior view of same. 



All figures \ natural size. 



Plate VIII. 



Fig. I. Front view of ulna-radius and carpus of Oxydactylus longipes, type (No. 

 918). Partly restored from cotype (No. 886). 



