PLATE 1. 



Bin k taster co nic us . 



Abactinal surface enlarged slightly over 4 times. 



PLATE 2. 



Blakiaster conicus. 



Fig. 1. Portion of actinal surface of disk, enlarged about 5 times. 



2. An adambulacral plate from near the middle of major radius; X15. 



3. An abactinal plate from base of ray; X15. 



4. Spinelets from abactinal plates, enlarged. 



5. An actinal interradial area, with spines removed. The odd inter- 

 radial actinals are dotted; ad, adambulacral plates; m, the first 

 marginal; X4. 



0. Abactinal plates from inside and base of ray; the smaller secondary 

 plates are shaded ; r-r, radial series; X10. 



