PLATE CVI. 



FIGS. I, 2. Evasterias troschelii (Stimpson) Verrill. Young. Dorsal and 



actinal sides ; X iH- Sitka. Yale Mus. 

 FIG. 3. Asterias acervata Stimpson. A strongly acervate young specimen ; 



X iH- Nazan, Alaska (Dall). U. S. Nat. Mus. 



(214) 



