PLATE XLIX. 



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



Atlantic specimen. Part of the dorsal surface ; X r 4- 



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\ m , supramarginals ; 

 m", m" , inferomarginals ; b, 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 (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 ; 3a, 3b, interior surface of valves ; 3c, 3d, 

 two of the smaller forms ; 3e, 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', tri, 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. 5a. The same. Part of the dorsal surface. X about 2. 



Fig. 6. Hippastcria phrygiana. Part of disk, showing madreporic plate ; 



X8. 



(100) 



