PLATE VI. 



Fig. i. Glyphaster anomalus (Fisher) Verrill. Actinal side;Xi%- British 

 Columbia. 



Fig. 2. The same specimen. Dorsal side; X i%- 



Fig. 3. Dermasterias imbricata (Grube) Perrier. A young specimen, six- 

 rayed. Dorsal side; X'^ 



Fig. 4. The same, adult. Details of ventral side; P, P, pedicellariae; X 2. 



Fig. 5. The same specimen. Portion more enlarged. P, P. bivalved pedicel- 

 lariae ; P', P', trivalved pedicellariae ; X 4- 



<>4> 



