PLATE XLIII. 



Epiastkr klegans (Shumard) (page 80). 



Fig. la. Upper portion of the anterior ainbulacriuu, enlarged. 



lb. Middle portion of the petaloidal region of the anterior aiubnlacruui, highly 



magnified. 

 Ic. Ditto, left antero-lateral ambulacrum. 

 Id. Two interambulacral plates, much enlarged. 

 le. Apical disk, enlarged. 



Epiasteu Whitei Clark (page 82). 



Fig. 2a. Lateral view of the test. 

 2i, Posterior view of the same, 

 2c. Left antero-lateral ambulacrum, enlarged. 

 2d. Diagram showing the arrangement of the plates in the apical disk and 

 bordering areas, 



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