JAPANESE ASTEROIDEA. 253 



arms, where they are either flush with the inferomarginals or 

 slightly more projecting. At the interbrachial arc the supero- 

 marginals are three times as broad as long, but they become 

 relatively much longer distally. At a short distance from the 

 tip of the arms the superomarginals are mostly seen to decrease 

 in breadth rather suddenly, so that the paxillar area is more or 

 less broadened out (PL IX, fig. 140). From about the middle of 

 the arms outwards the superomarginals are very nearly twice as 

 broad as long. In my specimen almost all of the superomarginals 

 are denuded of their armature, but from what little scraps left 

 on them I infer that they were uniformly and thickly covered 

 with subcapillary spinelets of a silky appearance. I imagine that 

 there were no prominent spines, as the surface of the superomargi- 

 nals presents a very finely and uniformly granulated appearance. 

 The fasciolar grooves are rather shallow but well developed, and 

 are covered with capillary spinelets. 



Inferomarginals. — The inferomarginals are much more projecting 

 than the superior series at the interbrachial arc and the greater part 

 of the arms, and form the lateral margin of the body, except for 

 a short stretch near the tip of the arms. Like the superomarginals 

 they are about three times as broad as long at the interbrachial 

 angle, but become relatively much longer towards tlie tip of the 

 arms. The two marginals are coincident along nearly half the 

 length of the arms, but in the more distal part they are alternate. 

 The inferomarginals are uniformly covered with a thick coat of 

 very fine, somewhat flattened spines of a silky appearance. The 

 fasciolar grooves are covered with very short capillary spinelets. 



Adambulacrals. — The adambulacrals are more numerous than 

 the inferomarginals by only four or Ave for the entire arm. As 



