PLATE XXIV. 



Fig. i. Orthasterias columbiana Verrill. Type. In alcohol. Actinal side of a 



ray; X iji. 

 Fig. 2. The same specimen. Dorsal side of a ray; X i%- Yale Mus. Same 



specimen as pi. xix. 

 Fig. 3. Evasterias acanthostoma Verrill. Type. Part of a ray (dry), side 



view ; about natural size. Univ. Calif. 

 Fig. 4. Orthasterias columbiana Verrill. Details of actinal side; X i%- 



Yakutat, Alaska. Yale Mus. 



(50) 



