PLATE VI. 



FIG. I. Glyphaster anomalus (Fisher) Verrill. Actinal side;Xi^. British 

 Columbia. 



FIG. 2. The same specimen. Dorsal side; X !% 



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

 rayed. Dorsal side; X i^- 



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- 



(14) 



