PLATE V. 



FIG. I. Henricia leviuscula, var. spatulifera Verrill. Type. One of the 



actinal interradial areas, jaws, and proximal adambulacral 



spines ; X 6. Monterey. Yale Mus. 

 FIG. 2. Crossaster papposus (Linn.) M. & Trosch. An interradial area 



and jaw; enlarged. 

 FIGS. 3, 4. Mediaster aqualis Stimpson. Portions of dorsal and actinal sides 



of a ray ; X 6. 

 FIG. 5. The same. Portion of dorsal side of a ray with spinules removed, 



showing plates and papular areas ; X 8. 

 FIG. 6. Ctenodiscus crispatus (Retz.) D. & Kor. Portion of an interradial 



area, inferomarginal plates, and jaws; after Ludwig, from a 



Bering Sea specimen ; X 4- 

 FIG. 7. The same. Front view of upper and under marginal plates ; X 5- 



From the same. 

 FIGS. 8, 80. The same. One of the fasciolar spinules, side and profile views ; 



X 120. From the same. 



(12) 



