PLATE XLIX. 

 Fig. I. Henricia sanguinolenta, van pectinata Verrill. Type. From an 



Atlantic specimen. Part of the dorsal surface ; X 14. 

 Fig. la. The same specimen. Part of under surface and side of a ray; 



a, adambulacral spines; a', inner or groove-spine; p, p, per- 



actinal row of pseudopaxillae ; m\ nC , supramarginals ; 



m", m", inferomarginals ; h, b, papulae ; X 14. 

 Fig. lb. The same. Profile view of one interambulacral and one per- 



actinal group of spines ; X 14. 

 Fig. 2. Henricia sanguinolenta (Miill.) Bell. Young. Atlantic specimen. 



Altered from Duncan and Sladen, X 5- 

 Figs. 3-3^. Major or forficulate pedicellariae of Pisaster ochraceus, much 



enlarged; 3, profile view of one of the larger erect, unguicu- 

 .-^ late, lateral kind; 3J, 3&, interior surface of valves; 3r, 3^, 



two of the smaller forms ; ^e, a small group of the small pedi- 



/ cellate forms found on the margin of the adambulacral plates. 



Fig. 4. Crossaster papposus (Linn.) M. & Tr. Part of the skeleton of a 



ray, of an Arctic specimen, after Danielssen and Koren; 



a, a, adambulacral plates; m', m', superomarginals ; m", m", 



inferomarginals; c, connective ossicle; d, dorsal plates and 



pseudopaxillae ; enlarged. 

 Fig. 5. Ctenodiscus crispatus (Retz.) D. & Kor. From an Atlantic speci- 



men, after Miiller and Troschel. Under side of base of a 



ray. 

 Fig. 50. The same. Part of the dorsal surface. X al 2. 

 Fig. 6. Hippasteria phrygiana. Part of disk, show ^ madreporic plate; 



X8. ^ 



(100) 





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