PLATE XLIX. 



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



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



FIG. ia. 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 pseudopaxillx ; m' ' , m', supramarginals ; 

 tn", m", inferomarginals ; b, b, papulae ; X H- 



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- 



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 ; 30, 3&, interior surface of valves ; $c, 3<f, 

 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 about 2. 



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



X8. 



(too) 



