PLATE XLIV. 



Epiasteu Whitei Clark (page 82). 



Fig. la. Upper surface of the test. 

 IV. Lower surface of the same. 



Ic. Right autero-lateral iuterambulacral area, much enlarged. 

 Id. Lower portion of the petaloidal region of the right antero-lateral ambnla- 



crum, highly magnified, 

 le. Several plates of the petaloidal region of the left antero-ambulacrum. 

 If. Peristomial opening, with surrounding ambulacral and iuterambulacral 



plates. 

 Ig. Apical disk, nnich enlarged. 

 192 



