DESCRIPTION- OP THE PLATES. 2< > 1 



Figs. 2-5. Side views of arms to show the variations in the form of 

 the joints of the arms and of the pinnules ; figs. 2-4 x 4. 

 fig. 5 x 5. 



Figs. 6-8. Different forms presented by the cirri, x 4. 



Plate X. 



Ctenodiscus crispatus (p. 64), from above 1 



from below,' } nat S1Ze - 

 » " ; superomarginal plates to show the 



irregularity in the disposition of the spines, x '2. 

 Pentagonaster granulans (p. 73), from above, nat. size. 

 Upper surface of portion of disk of P. granularis, x 3. 

 Lower surface of the same, x 3. 

 Porania pulvillus (p. 79), from above, 1 



from the side, j nat Slze - 

 Asterina gibbosa (p. 82), from above, nat. size. 



" » portion of lower surface, x 2. 



Plate XI. 



Fig. 1 Astropecten sphenoplax (p. 68), from above, nat. size 



4igs. 2 & 3. Views of the arms of different specimens seen from 



below to show the variations in the form of the marginal 



plates, x4. 



Plate XII. 



Asterias murrayi (p. 103), from above, to show the genera] 



appearance of the species, nat. size. 

 Portion of arm, seen from above, to show the character of 

 the spmulation, x 2. 

 Fig. 3. Asterias hispida (p. 103), seen from above, nat. size. 

 -tig. 4. An arm of Asterias hispida, seen from above, x 3. 



Fig. 



Fig 



Fig. 1 



Plate XIII. 



Ophiocten sericeum (p. 113), from above, to show the mode 

 ot scaling of the disk, x 2. 

 Fig. 2. Mouth-shield and papillae of the same, x 6 

 ttg. 3. Oplaocnidabrachiala (p. 116), nat. size, to show the general 



form ot the species, seen from below. 

 Jig. 4. Portion of disk of the same, from above, x 4 

 *ig. o. Upper view of part of an arm of the same, x 6 



