NEW STARFISHES FROM THE PACIFIC COAST II3 



terete blunt spinelets ; spinelets occupying center of tabulum 

 form a coordinate flat-topped group, usually stand upright and 

 are crowded; peripheral spinelets usually radiate and are not 

 equal in length. 



Marginal plates short, band-like, but both series more con- 

 spicuous than in L. a'rcticus; superomarginal plates, 30 in 

 number from interradial line to extremity of ray much wider 

 than long on proximal half of ray, the width rapidly decreasing 

 on outer portion until plates are nearly quadrate. Plates form 

 an arched bevel to margin of abactinal area, are separated by 

 deep fasciolar grooves, and are covered with short delicate 

 terete spinelets which form a close nap all over exposed surface. 



Inferomarginals corresponding to superomarginals, beyond 

 which they extend laterally forming margin of ray; separated 

 from superomarginals by rather wide groove ; short, band-like, 

 separated by fasciolar furrows, forming well-arched bevel to 

 actinal surface ; first plate about twice as wide as corresponding 

 superomarginal ; all densely covered with small spinelets similar 

 to those of superomarginals, but a trifle larger, those of trans- 

 verse median region slightly squamiform and directed outward. 



Actinal intermediate areas rather smaller than in L. arcticus; 

 one series of intermediate plates extending about three-fourths 

 length of ray or to eighteenth inferomarginal ; a second series 

 extending to seventh or eighth plate, and a third series con- 

 fined to angle bounded by adjacent first 2 plates. Intermediate 

 plates with a low tabulum crowned by a coordinate group of 

 15 or 20 papilliform spinelets, those in center being slightly 

 thicker and more clavate than the peripheral ones. 



Adambulacral plates about as wide as long with a rounded 

 furrow margin, but first 2 or 3 plates wider than long and with 

 more angular margin. Armature consists of (1) a furrow r series 

 of 4 (more rarely 5) slender, rather long, blunt cylindrical 

 spinules, the two central being slightly the longest or the 4 

 subequal ; (2) on actinal surface are 2 or 3 longitudinal series 

 of about 4 similar spinules which decrease in size toward outer 

 edge of plate ; third series when present more irregular, its 

 spinelets distinctly tapered, slenderer, shorter and sharper. 

 Furrow spinelets usually bent back from furrow, and arma- 

 ture has a decidedly crowded appearance. 



