96 VERRILL 



row ; they are smaller than the dorsals, but of the same form. The 

 inferomarginal spines stand mostly two on a plate and with the per- 

 actinals form three regular nearly equal rows. They are larger than 

 the superomarginals and either cylindrical or slightly tapered, 

 obtuse, finely sulcate. The peractinals are rather smaller than the 

 rest and less obtuse. 



Adambulacrals form a single row; they are about as long as the 

 actinals, but much more slender and evenly tapered. Three or four 

 of the inner adoral plates, forming the compressed carinae, are with- 

 out spines. 



A few large, ovate, unguiculate pedicellariae occur on the lateral 

 channels and adambulcral plates. Some smaller acute-lanceolate 

 ones occur on the inner edges of the grooves. Minor pedicellariae 

 are rather thickly scattered everywhere over the dorsal and lateral 

 integument. 



Another young specimen of larger size, with the radii 16 mm. and 

 82 mm., was sent by Dr. C. F. Newcombe. It was taken at Kuper 

 Island, B. C., February, 1894. This agrees closely with the smaller 

 one, described above, in the number and character of its dorsal 

 spines, but the ventral spines are relatively stouter and form four 

 rows proximally. 



The dorsal minor pedicellariae are much more numerous, both on 

 the integument and around the spines, especially distally, where they 

 form large dermal clusters. The papular areas are also very large, 

 with numerous papulae. Thus it has in most respects the characters 

 of the adult. 



Large major pedicellariae are rather numerous on the interradial 

 areas and sides of the rays ; and many large, very acute, lanceolate 

 ones occur on the inner edges of the grooves, sometimes in regular 

 rows, one to a plate, for some distance. Most of these are sur- 

 rounded at base by clusters of smaller major pedicellariae of about 

 the same shape, but of various sizes. 



This specimen is remarkable for having two spines on some of the 

 adambulacral plates, here and there, the second spine being smaller 

 and attached back of the regular one. This condition has not been 

 noticed in the other specimens. 



The adoral carinae are rather long and strongly compressed, de- 

 scending abruptly to the mouth in all our specimens, and destitute of 

 spines on three or four adoral plates. Apical peroral spines long, 

 tapered, about equal to adorals, side-spines apparently lacking, or 

 replaced by a cluster of pedicellariae; epioral spines lacking on our 

 specimens. 



