PLATE XLIX. 

 FIG. I. Henricia sanguinolenta, var. pectinata Verrill. Type. From an 



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



FIG. 10. 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', m', supramarginals ; 



m", m", inferomarginals ; b, b, papulae; X 14- 



FIG. ib. The same. Profile view of one interambulacral and one per- 



actinal group of spines ; X 14. 

 FIG. 2. Henricia sanguinolenta (Mull.) Bell. Young. Atlantic specimen. 



Altered from Duncan and Sladen, X 5- 



ft FIGS. 3-30. Major or forficulate pedicellariae of Pisaster ochraceus, much 



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



late, lateral kind; 30, 3&, interior surface of valves; 3C, 3d, 



- 



t>l two of the smaller forms; 30, 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 about 2. 

 FIG. 6. Hippasteria phrygiana. Part of disk, showing madreporic plate; 



X& 



(100) 



