Plate XIV. 



Edrioaster bigsbyi. 



Fig. 1. The adapical face of E 15930, with same orientation as 

 Plate XIII. The minute plates of the central integument are well shown. 

 In the place of the frame are the circular elevations of this integument 

 described on p. 169. Photographed by Mr. H. G. Herring, x 3 diam. 



Fig. 2. Part of the circumoral region of the test of E 16172, seen from 

 the interior, as described on p. 165. Drawn by Mr. W. G. Browning, 

 x 3 diam. 



Fig. 3. Some floor-plates of E 16172, showing the ridges that lead 

 from the peripodia to the perradial channel. Drawn by Mr. G. C. Chubb, 

 x 10 diam. 



[1914 171] 



