SHALLOW- WATER STARFISHES 165 



The adambulacral spines are crowded in two or three irregular 

 rows, the plates bearing either one or two in irregular alternation. 

 They are about as long as the peractinal spines and resemble them 

 in form, but are more slender. They are mostly clavate with rounded 

 rough tips. The outer ones are the larger. They bear small 

 clusters of pedicellariae. Minor pedicellariae also occur in small, 

 dense clusters on all the ventral and dorsal spines, and singly on the 

 dorsal papular areas ; they are very small. 



Major pedicellariae are very few. The largest are relatively large, 

 nearly equal to the adjacent small spines in thickness, stout, triangu- 

 lar-ovate, obtuse; these stand erect in the actinal interradial areas. 

 A few very much smaller ones, similar in shape, occur on the adam- 

 bulacral spines. 



The dermal ossicles are numerous and unusually well developed, 

 so that the dried specimen is firm and rigid. 



Sitka (Dr. W. R. Coe, Harriman Expedition). 



These specimens superficially somewhat resemble C. cribraria, but 

 are very distinct in the form and size of the pedicellariae, in the much 

 stouter dorsal ossicles, in the arrangement of the dorsal spines, and 

 in the form of the marginal, ventral, and adambulacral spines. 



This is quite unlike all the varieties of L. epichlora in appearance. 

 It was at first thought to be a new species. It may be distinguished 

 from epichlora by the small size of the dorsal spines and their 

 areolate arrangement ; they are not crowded as in subsp. miliaris. If 

 they were all enlarged the appearance would be much as in subsp. 

 alaskensis. The numerous regular, even rows of slender marginal 

 and actinal spines are also characteristic. The dorsal ossicles are 

 numerous and form a strong reticulation. No very large, serrate 

 major pedicellariae occur on the types. 



This is, no doubt, one of the regular young forms of E. troschelii, 

 but my specimens are not sufficiently numerous to connect it with 

 either of the special varieties of that species. It is apparently most 

 like the typical form. 



EVASTERIAS ACANTHOSTOMA Verrill, sp. nov. 

 Plate xx, figures i, 2; plate xxiv, figure 3 (type). 



A large species with a rather contracted disk and five long, tapered, 

 flexible arms. Lesser radii of the type, 30 mm. ; greater radii, 275 

 mm. Ratio, as 1:9. 



It is remarkable for the length of the oral and adoral spines and 

 the adjacent actinal spines ; for the numerous crowded ventral spines, 



