NEW STARFISHES FROM TIIF. PACIFIC COAST 135 



tered intermediate plates extending nearly to tip of ray ; abac- 

 tinal skeleton similar to that of preceding species, but slightly 

 less open, i. c, meshes somewhat smaller; paxillae small, 

 spaced, typically arranged with more or less regularity on disk, 

 in series parallel with median radial ; anal aperture prominent. 



Abactinal integument entirely obscuring underlying skeleton, 

 unless dried or treated with caustic potash. Paxillae small, 

 spaced, with a low tabulum surmounted by i to 6 slender blunt 

 or pointed, tapering spinelets. In life these spinelets are thick, 

 short and stubby, owing to a membranous investment, and are 

 usually 3 or 4 to each paxilla. In center of disk and along 

 distal half of ray, paxillae irregularly arranged, but between 

 these two areas an arrangement in longitudinal rows more 

 or less evident. Base of paxillae with 3 or 4 slender unequal 

 lobes impinging upon those of neighboring paxillae or connected 

 by short irregular ossicles ; latter not numerous ; near center of 

 disk there are 1 or 2 isolated ossicles in many of the meshes. 

 Anus surrounded by 4 or 5 large paxillae. As in preceding spe- 

 cies a very narrow bare sulcus extends from interradial angle 

 about half way to center of disk. Papulae prominent, but 

 usually not quite so large as in preceding species, about 3 to 10 

 to a mesh on disk, 1 to 3 in distal half of ray where skeleton 

 is closer. 



Marginal plates, about 30 to each side of a ray, prominent, 

 confined to side wall of ray, paxilliform with fairly high pedi- 

 cels (relatively about as in papposits), bearing 2 vertical or 

 transverse palmate series of 6 to 9 stout tapering pointed skin- 

 covered spines, the mesial of which are the longest. Some- 

 times there is 1 main series and 2 or 3 smaller spines stand 

 adorally out of the series, or there may be a second adoral 

 series of less conspicuous spinules, but few in number. Spines 

 of proximal plates shorter than rest, except near tip of ray. 



Actinal interradial areas rather small, about 35 to 40 plates 

 to each area. Plates obscured by integument which has fine 

 furrows or wrinkles leading from interadambulacral sulcuses 

 to marginal plates. Plates appear spaced, each bearing 1 to 4 

 short stubby papilliform spinelets, very delicate when dried. 

 Plates arranged irregularly in rows, between the wrinkles. A 



