JAPANESE ASTEROIDEA. 585 



" Tliis specimen agi'ees very well with tlio original description of Müller 

 and Troschel, and with the notes given by be Loriol (Mem. de Société 

 Thy s. et d'llist. Nat. Geneve, XXIV, 1885, p. 48). De Loriol also gives 

 a good figure (op. cit., ^A. XV, fig. 6) with which <jur example shows a 

 foAv imimportant x^^iiits of difference. 



" Form pentagonal, the sides of disk only very slightly cm-ved inward. 

 Pt = 29mm. ; r — 23.5 mm. 11 = 1.23 r. As noted by de Loriol there are 14 

 suporomarginals to a side, or 7 to the ' ray ', instead of G, as stated by 

 3IÜLLER and Troschel. The ultimate plate of each series is very small, 

 and is Avedged between the penultimate and ocular plates. There are 9 in- 

 feromarginals to the ra}-, the last plate being very small indeed. 



" The superomargiuals are somewhat tumid, and are broader than high. 

 Besides the even, fine granulation, each bears from 2 to 10 conspicuous, 

 low, hemispherical, or subconical, tubercular granules, unevenly disposed. 

 Inferomarginals are similarly armed. There are no pedicellariie on any of 

 the marginal i)lates. Between the two series of marginal plates, on the 

 lateral Avail of the ])ocly, is a row of 5 to 7 pits, each of which occurs at 

 the junction of a dorso ventral with the horizontal suture. 



"Abactinal sm-face is covered with a much finer granulation than the 

 actinal, and each plate is surrounded by 6 to 8 papular areas which appear 

 in many cases practically confluent. These areas contain 8 to 20 pores, and 

 a cuneiform area containing about 15 to 18 pores occiu's between the 

 dorsal ends of the superomargiual plates (excepting l)etween 5 and 6 and 6 

 and 7). Each aljactinal plate bears near the centre 1 to 3 of the tubercular 

 granules, a few of which occur also, here and there, over the papular areas. 

 A number of plates toward centre of disk bear small bivah'ed pedicellarioe 

 similar to those of Pentoccros and flush Avith the general level of the granu- 

 lation. These are not very numerous and are in'egularl}' scattered, never 

 more than 2 to a plate. The madreporic bodj' is raised above the general 

 surface and is situated about one-third the distance from the centre to margin. 

 Al)out its Ijorder are several tubercular gi-anules. Tht^ plates toAvard the 

 end of ray and adjacent to superomargiuals appear to btj a trifle convex, 

 tlie tumidity being suruKjunted l)y the granule, or granules. 



