NO. 5 TERTIARY ECHINOIDS FROM FLORIDA — KIER 55 



60 



CO 



«r 50 

 u 



40 



x 30 



Q 



20 



10 



+ + 



+ ♦ 



10 20 30 . 40 50 60 70 80 



LENGTH IN MILLIMETERS 



Fig. 57. — Agassizia porifera (Ravenel). Width of test relative to length. 



Occurrence. — Florida, Caloosahatchee formation, loc. 2, 6. South 

 Carolina, The Grove, Cooper River ; U.S.G.S. 18759, Intracoastal 

 Waterway canal in Horry County 1 to \\ miles southwest of the 

 bridge on U.S. Highway 17 near Nixons Crossroads, about 5 miles 

 southwest of Little River. 



Types. — Location of holotype not known; figured specimens, 

 U.S.N.M. 562462, U.S.G.S. 18759, 648154-9, loc. 6. 



Figs. 51-56. — Agassizia porifera (Ravenel) : 51-53, Adapical, right side, pos- 

 terior of U.S.N.M. 648157, from the Caloosahatchee formation, loc. 6, showing 

 position of fascioles, X 0-6; 54, portion of ambulacrum IV of U.S.N.M. 648154, 

 from the Caloosahatchee formation, loc. 6, showing the slightly developed ante- 

 rior poriferous zone, X 13; 55, peristomal region of U.S.N.M. 648158, from the 

 Caloosahatchee formation, loc. 6, X 2; 56, apical system of U.S.N.M. 648159, 

 from the Caloosahatchee formation, loc. 6, X H. 



