PLATE LVI. 



CcELOPLETJRTJS INFTJLATTJS (Morton) (]). 117). 

 Acad. Nat. Sci. Philadelphia 1076. 



Figure la. Upper surface of the test, X 2. 

 lb. Lateral surface of the test, X 2. 

 lc. Lower surface of the test, X 2. 

 Id. L T pper portion of an ambulacrum, X 6. 

 le. Four compound plates of an ambulacrum, X 6. 

 If. Three plates of an interambulacrum, X 6. 

 lg. An interambulacrum, X 6. 

 lb. Tubercle, X 10. 

 li. Apical system, X 4. 



Figure 2a. Upper surface of the test. 

 2b. Lateral surface of the test. 



Figure 3. Spines. 



39800°— 15- 



Orthechintts pretiostjs Clark, n. sp. (p. US). 

 U. S. Nat. Mus. 148455, type. 



Echinus (?) sp. (p. 118). 

 Johns Hopkins Univ. T 2000. 



