VERTEBRATA. 



Q.ASS REPTILIA. 



Order CROCODILIA. 

 Suborder HNSUCHIA. 

 Family CROCODILIDAE. 



Genus THECACHAMPSA (CROCODILUS) Cope. 



Thecachampsa sp. 

 Plate X, Figs. 1, 2. 



Description. — A very large vertebra, probably dorsal, gives evidence of 

 an animal of considerable size. The anterior face is deeply concave, 

 and the rounded posterior face marked by a deep pit. It is impossible 

 to determine whether the vertebra belongs to any one of the sjjecies 

 below described and which are based on the teeth and jaws alone, and it 

 therefore seems undesirable to assign a specific name to it. 



Occurrence. — Aquia Formation. Liverpool Point. 



Collection. — Maryland Geological Survey. 



Thecachampsa seeicodox (?) Cope. 

 Plate X, Fig. 3. 



Thecachampsa sericodon Cope, 1867. Proc. Acad. Nat. Sci. Phila., p. 143. 

 Thecachampsa sericodon Cope, 1869. Proc. Acad. Nat. Sci. Pbila., p. VI ; Amer. 



Nat., p. 91. 

 Thecachampsa sericodon Cope, 1871. Trans. Amer. Phil. Soc, vol. xlv, p. 64, pi. v, 



figs. 7 and 8. (Pages 1-104 appeared in 1S69.) 

 Thecachampsa sericodon Cope, 187-t. Proc. Acad. Nat. Sci. Phila., p. 363. 



Description. — A long slender tooth with a strong root represents this 

 or an allied species. The specimen is water-worn and it is impossible 

 to determine its characters exactly. 



Occurrence. — Aquia Fobmatiox. Clifton Beach. 



Collection. — Maryland Geological Survey. 



