328 VERRILL 



covered with fine spinules. The inferomarginal plates are convex, 

 not carinated. The dorsal plates are finely spinulated paxillae. 

 Adambulacral plates much as in Leptychaster. 



Professor Fisher (op. cit, 191 ib) does not recognize this as a 

 distinct genus. 



GLYPHASTER ANOMALUS (Fisher) Verrill. 

 Plate i, figures i, 2; plate vi, figures i, 2. 



Leptychaster anomalus FISHER, 1906, p. 115; 19116, p. 48, pi. vu, fig. 4; pi. ix, 



fig. i; pi. L, figs. 2, 20. 

 Glyphaster anomalus VERRILL, op. cit., 1909, XLIII, p. 554. 



The stout inferomarginal plates on the disk and rays correspond 

 each to two adambulacrals, except the first pair, each of which is 

 connected with three adambulacrals by lines of interactinal plates. 

 But in L. arcticus each inferomarginal corresponds pretty closely 

 with a single adambulacral, except the two proximal interradials, 

 each of which is connected with two adambulacrals by lines of inter- 

 radials. 



The sutures between the inferomarginals are straight and distally 

 nearly at right angles to the furrows, while in L. arcticus they are 

 all oblique, and distally very oblique and curved, with the inner end 

 turned adorally, so that the corresponding adambulacral is about 

 opposite the outer end of the preceding marginal. 



The epioral side of the jaws is elevated and laterally compressed, 

 narrower aborally, and the two halves are close together, leaving a 

 narrow, strongly fasciolated groove between them, while in L. arcti- 

 cus they are not so prominent, elliptical, with no distinct fasciolated 

 groove. 



Bering Sea, off Pribilof Islands and St. Paul, to southern Alaska, 

 and to Japan, in 32 to 688 fathoms ; off Monterey, California, in 

 871 fathoms (Fisher). 



Family PORCELLANASTERID& Sladen. 



PorcellanasteridcE SLADEN, 1886 ; Voy. Chall., xxx, p. 125, 1889. Fisher, op. cit., 

 191 ib, p. 22. 



Disk usually broad, with short rays and high margin. Marginal 

 plates usually paired (inferior ones are sometimes abortive), thin, 

 usually covered with strong membrane, seldom granulose, sometimes 

 with spines; edges commonly fasciolated, or there may be special 

 fasciolated or cribriform organs. 



