JAPANESE ASTEEOIDEA. 481 



" Adambiilaci-al spinnlation diplacaiithid, the spiues blunt ; in the inner 

 row there are ordinarily seven spines, of which the median are the more 

 prominent ; in the outer row there are tAvo or three larger spines, one of 

 which is often, when only two are developed, much larger than the other ; 

 tliese spines have a direction a little oblique to the longitudinal axis of the 

 arm. Between the outer and inner rows a "svell-developed forcipiform x^edicel- 

 laria is placed. Beyond the outer row there are iiTegularly shaped separate 

 gi"anules, which appear, at first, to afford indications of a third row of ad- 

 ambulacral spines. 



" The ventral ossicles are often distinguishable from one another owing 

 to the larger size of the granules in the centre than at the edge of the 

 ossicle ; sessile valvular pedicellaria3 are richly developed among the gran- 

 ules. Large and coarse granules are also to be observed on the marginal 

 plates, on which, however, pedicellairse are only rarely developed. 



" The upper surface, both of the disk and of the arms, is delicately re- 

 ticulated. The pore areas are well separated from one another, and are, in 

 all the more proximal parts of the arm, of some size, and contain more than 

 twenty pores. 



" The areas of the two lower series along the sides of the arms some- 

 times become fused at certain points ; the lower series extend into the space 

 between every pair of superomarginal plates. The granulation on the nodal 

 points is rather more delicate than on the ventral surface, and the sessile 

 pedicellarise are exceedingly small. 



" Nearly all the ossicles along the lophial line are elongated ; some 

 are more so than the rest, and two or three generally attain to considerable 

 prominence ; those which flank the apical region are large and rounded, 

 and are, like the rest, covered with a close-set investment of rather large 

 flat gi-anules. A few pedicellariee are to be observed among the granules 

 of the apical region, where no spine or protuberance of any kind is 

 developed. The madreporite forms an elongated oval whose longer axis is 

 directed downwards, and is placed just outside the boundary of the aj)ical 



region. 



^'Colom- (dry) dirty yellow, probably deep 3-ellow in life. 



