NO. 5 TERTIARY ECHINOIDS FROM FLORIDA — KIER 27 



Clypeaster dalli (Twitchell). Jackson, 1922, Carnegie Inst. Washington Publ.. 



306, p. 37, pi. 4, fig. 1. 

 Clypeaster rosaceus (Linnaeus). Cooke (part), 1942, Journ. Paleont., vol. 16, 



p. 11. 

 Clypeaster rosaceus (Linnaeus). DuBar, 1958, Florida Geol. Surv. Bull. 40, 



p. 209, pi. 12, fig. 17. 

 Clypeaster rosaceus (Linnaeus). Cooke (part), 1959, U.S. Geol. Surv. Prof. 



Paper 321, p. 34. 



80 



70 



£60-1 



\- 



UJ 



=£0 



H 



§40 



X 



30- 



20 



+ ++ 



70 80 90 100 110 120 130 !40 



LENGTH IN MILLIMETERS 



Fig. 19. — Clypeaster rosaceus dalli (Twitchell). Height relative to length 



of test. 



Diagnosis. — Subspecies characterized by broad test. 



Material. — Sixty-nine specimens. 



Shape. — Large, largest specimen 145 mm long, smallest 70 mm; 

 elongate with width varying from 79 to 90 percent of the length; 

 height very variable (text figs. 19, 21, 22), varying from 36 to 57 

 percent of the length; marginal outline variable, angularly penta- 

 gonal in some specimens, smoothly pentagonal in others; anterior 

 margin pointed, posterior truncated, sides indented slightly in all but 

 three specimens ; petals strongly inflated in some specimens, slightly 

 inflated in other, adorally test greatly depressed in area immediately 

 around peristome. 



