ASTEROIDEA OF NORTH PACIFIC AND ADJACENT WATERS — FISHER 153 



In anthosticta the plates are smaller and the sutural margin is much shorter than the 

 mouth plates. There are 34 or 35 adambulacrals in the length of the first 10 spinifer- 

 ous inferomarginals. 



The combined mouth plates are broader than long. Each plate has a curved 

 actinostomial margin carrying two chisel-shaped spines invested with membrane 

 bearing lanceolate straight pedicellariae. A somewhat similar though usually longer 

 suboral spine stands on the outer part of the plate. 



Papulae numerous and prominent abactinally, on proximal half of ray and mar- 

 ginal portion of disk; few on outer part of ray and center of disk; several in each 

 intermarginal area throughout ray, but more numerous proximally. 



Crossed pedicellariae of generically characteristic form (pi. 73, fig. 2) are very 

 numerous on the abactinal and marginal spines. Each jaw has on one side of the 

 tip an enlarged terminal tooth and on the other two or three enlarged teeth, but 

 smaller. There are numerous shank teeth. The pedicellariae which measure about 

 0.27 mm. long are not different in essentials from those of anthosticta. 



Very small lanceolate straight pedicellariae 0.2 to 0.3 mm. long are scattered over 

 the abactinal and lateral surfaces and along the furrow margin. The latter are 

 pedunculate and at the base of ray several may occur in a cluster, recalling a charac- 

 teristic of Pycnopodia. They occur also on the actinostomial oral spines, in the actinal 

 interradial region (reaching 0.5 mm.), and on the in fero marginal plates where they 

 are largest (0.6 to 0.7 mm.). 



The madreporic plate is large (3.5 mm. in diameter), slightly convex, with fine 

 radiating branched striae, and is situated near the margin. 



The ambulacral furrows are broad and shallow and show at the base only a 

 faint indication of the broadening that characterizes alcoholic specimens of antho- 

 sticta. At the second adambulacral the furrow is as wide as the length of the first 

 3.5 spiniferous inferomarginals (7 mm.). Ambulacral pores in four distinct series; 

 tube-feet long, probably very crowded. Actinostome not at all sunken, 8 mm. in 

 diameter. Radial nerves broad, as in anthosticta. 



Type. — In Riksmuseum, Stockholm (Orig. No. 556). 



Type-locality. — De Castries Bay, Amur Province (opposite Saghalien), eastern 

 Asia. Museum GodefTroy. 



Distribution. — Known only from the type. 



Remarks. — I am indebted to Dr. H. L. Clark for the loan of the type which has 

 enabled me to make satisfactory comparisons directly with specimens of anthosticta. 



Genus PYCNOPODIA Stirapson 



Pycnopodia Stimpson, Proc. Boston. Soc. Nat. Hist., vol. 8, 1861, p. 261. Type Asterias 

 helianthoides Brandt. — Viqcier, Squclette des Stellerides, 1879, p. 109. — A. Aqabsiz, 

 North American Starfishes, 1877, p. 100. — Vekrill, Shallow-water Starfishes, 1914, 

 p. 197. 



Diagnosis. — Size large, rays numerous (upward of 24); abactinal skeleton 

 abortive, consisting of isolated plates and lateral oblique tongues of small plates 

 widely spaced on proximal part of ray, imbedded in the very flexible, tough integu- 

 ment; abactinal spines solitary, subacicular, surrounded by a thick sheath bearing 

 a pompon of crossed pedicellariae; papulae largo, compound, aggregated in clusters 

 springing from a common coelomic passage; superomarginal plates lateral, lobed, 

 alternately monacanthid and spineless, directly imbricated and united to the ventro- 



