EXPLANATION OF PLATE VIII. 



Figures all one-half the diameter of nature. 



Fig. 1. A lumbar vertebra of a crocodile. From Little Sandy River. Hayden's collection of 

 1870. (Crocodilus Elliotti.) 



Fig. 2. Ckocodilus aptus : 



A cervical vertebra, found on South Bitter Creek, Wyoming. 



Fig. 3. A first caudal vertebra of a crocodile. From Little Sandy River. Hayden's collec- 

 tion of 1870. 



Figs. 4-6. Crocodilus Elliotti. Hayden's collection of 1870. 



Fig. 4. Portion of the left maxillary, containing the fourth and fifth teeth of that bone 



From the junction of Big Sandy and Green Rivers. 

 Fig. 5. Upper extremity of a left femur. From near Little Sandy River. 

 Figs. 6, 7. Upper view of a large portion of the skull. Found by H. W. Elliott, on Little 



Sandy River. 

 Fig. 8. Left ramus of the lower jaw of a larger individual, or perhaps of a larger species, 



Discovered in the vicinity of Fort Bridger by Dr. Joseph K. Corson, and presented by him 



to the Academy of Natural Sciences of Philadelphia. 



