JAPANESE ASTEROIDEA. 363 



especially in the distal parts of the arms. They are covered with 

 granulations similar to those of the superomarginals but slightly 

 coarser. They also bear pedicellariae similar to those of the 

 superior series ; they appear to be present more usually near the 

 superomarginals than on the actinal surface, and their distribution 

 along the arms coincides in a general way with that on the 

 superomarginals. The inferomarginals are widest in the inter- 

 brachial arcs, and become narrower along the arms. 



Adamhulacral plates. — Along the greater part of the furrow 

 the adamhulacral plates are, when viewed from the actinal side, 

 nearly square, with a curved side towards the ambulacral furrow, 

 but in the distal parts of the arms they are more or less wedge- 

 shaped. On looking into the farrow, the plates are seen to be 

 tall and have a keeled surface. There is a furrow series of stout, 

 flattened spines strictly parallel to one another, 10-13 in number 

 (PI. X, fig. 159) ; in my specimens the longest ones are 3-4 mm. 

 Next this furrow series is a naked space separating it from the 

 spines of the actinal surface of the plate. These spines are very 

 short and even granuliform towards the ventrolaterals ; they do not 

 show any definite arrangement and are 20-25 in number for each 

 plate near the base of the arms. In the distal part of the arms, 

 however, they are much more numerous and almost entirely 

 granuliform. Near the mouth end, again, the actinal spines are 

 less numerous, there being only 4-6 forming a single row. On 

 the actinal surface, close to the naked space there are one or two 

 pedicellariae of large size, usually near the adcentral end of the 

 plate fPl. X, fig. 159,160). When there are two, one of them is 

 usually smaller than the other ; they are both stout and of some 

 length. In the more distal parts there is usually only one pedi- 



