PLATE II.
E C H IN O ID E A and AST ERO ID EA .
F igure 1. S t r o n g y l o c 'en t r o t u s d r o b a c h ie n s is (O. F . M .), A . A g . Abactinal aspect, natural size.
2 . T h e same specimen, s e en in profile, natural size.
3. P o r tion o f te s t near th e ambitus, showing th e ambulacral and interambulacral areas,
magnified.
4 . A s t e r a c a n t h io n p o l a r e , M. & T. Abactinal aspect, reduced one half.
5. A ctin al aspect o f th e same specimen, reduced on e h alf.
6 . P o r tion near th e middle o f a ray, actinal aspect, magnified.
7. P o r tion near th e middle o f a ray, abactinal aspect, magnified.
8 . A similar portion from th e more compactly spinulated va riety o f this species, magnified.
9 . A s t e r a c a n t h io n g r c enland ictjm (S te en stru p ), L iitk en . Abactinal aspect, natural size.
10. A ctin a l aspect o f th e same specimen, natural size.
11. Portion near th e middle o f a ray, actinal aspect, magnified.
12. P ortion near th e middle o f a ray, abactinal aspect, magnified.
13. S t ic h a s t e r a l b u l u s (S tim p s.), Verrill. Abactinal aspect, natural size.
14. A larger and almost etyial-rayed variety from Proven.
1 5 . A c tin a l aspect o f th e same specimen, natural size.
16. Portion near th e middle o f a ray, a ctin al aspect, magnified.
1 7 . P o r tion near th e middle o f a ray, abactinal aspect, magnified.
18. C r ib r e l l a o c u la t a (L in ck ), Forbes. Abactinal aspect, n a tural size.
19. A c tin a l aspect o f th e same specimen, natural size.
2 0 . Portion near th e middle o f a ray, actinal aspect, magnified.
2 1 . P ortion near th e middle o f a ray, abactinal aspect, magnified.
2 2 . P e d ic e l l a s t e r p a l ^ o c r y st a l lu s , Sladen. Abactinal aspect, natural size.
2 3 . A ctin a l aspect o f th e same sp ecim en , natural size.
2 4 . Portion near th e m iddle o f a ray, actinal aspect, magnified.
2 5 . P o r tion near th e middle o f a ray, abactinal aspect, magnified.
2 6 . One o f th e pedicellarise, magnified.
Arctic/ AsteroicLew a n d EcJdnoidea.