PLATE L. 



Fig. I. Dermasterias imbricata (Grube) Perrier. a, c, pedicellariae, mostly 



bivalved, from actinal side ; X 26. 

 Fig. I a. The same specimen, a-c, bivalved and trivalved pedicellariae from 



the actinal side ; X 26. 

 Fig. \h. The same specimen, a-f, four-valved and five-valved pedicellariae 



from the dorsal side ; X '2-^' 

 Fig. 2. Ceramaster granulans (Retz.) Verrill. Plates of the dorsal side 



covered with granules ; the central one bears a bivalved pedicel- 



laria;X8. 

 Fig. 2a. The same specimen, with the granules removed from two of the 



plates ; X 8. 

 Fig. 3. Tosiaster arcticus Verrill. Type. A group of dorsal plates, par- 

 tially in profile; some of them {c, c) with the large granules 



removed ; also showing papular pores ; X 8. 

 Fig. 30. The same specimen. A group of dorsal plates, some of them {c, c) 



with the granules removed ; p, bivalved pedicellariae ; X 8. 

 Fig. 4- Hippasteria spinosa Verrill. Type, a', a' inner, and a, outer adam- 



bulacral spines ; p, p', pedicellariae of actinal plates ; X 8. 

 Fig. 4a. The same specimen. A group of dorsal plates and spines; p, />, 



pedicellariae; X8. 

 Fig. 4&, The same specimen. One of the dorsal plates with a pedicellaria ; 



X about 16. 

 Fig. 4c. The same. A dorsal pedicellaria of the broad form ; X about 16. 

 Fig. 5. Astropecten calif ornicus Fisher. Actinal side; a', a\ inner, and 



a, a, outer adambulacral spines; m, m, inferomarginal plates; 



c, c, inferomarginal spines ; X 8. 

 Fig. 6. Astropecten siderealis Verrill. Actinal side; a, a, outer adambu- 

 lacral spines; a', central spine of the adambulacral plate; a", 



furrow spines; c, c, inferomarginal spines; m, m, inferomarginal 



plates; X8. 

 Fig. 7. Stenasterias macropora Verrill. Type. Portion of the actinal side 



of a ray, with the spines removed ; X 5. 



(102) 



