JAPANESE ASTEROIDEA. 325 



fig. 1G7). External to this groove there are three or four series 

 of flat, polygonal granules, which are mostly larger than those of 

 the ventrolateral plates. There is a conspicuous, valvato pedicel- 

 laria close to the adcentral margin of the adambulacral plate in 

 the same line with the first series of the granules, although it 

 may sometimes be found more externally. Each series of the 

 granules may consist of 3-5. It may also bo noted that some 

 of the adambulacral pedicellariœ have three valves. Occasional- 

 ly there may be a granule in the groove separating the furrow 

 spines from the actinal granules. 



The mouth-plates are quite large, and each plate, when 

 denuded of its spines, is distinctly seen to have the form of an 

 isosceles triangle, the two plates being apposed to each other by 

 the base. The number of the spines are somewhat different in 

 my specimens from the description of S laden. On the furrow 

 margin there is for each plate a series of seven to nine short, 

 stout, prismatic, truncate spines, the innermost of which is 

 usually conspicuous by its large size. In both of my specimens 

 the mouth is closed, and the marginal spines stand erect. Along 

 the actinal suture line of the plate there is a series of some ten 

 granuliform spines, large and elongate at the mouth end and 

 diminishing in size and height towards the other end. In the 

 area enclosed by the above two series there are some 13-15 

 granules, which are generally larger and more elongate near the 

 mouth, but smaller and low towards the other end (PI. XT, fig. 

 166). 



The ventrolaterals are closely set and quadrangular near the 

 ambulacral furrows but irregularly polygonal in the interradial 

 parts". The granules are very small like those of the marginals 



