STAEFISHES OF THE PHILIPPHSTE SEAS. 335 



reduced to simple facets ; but on the outer third of the ra}'^ the plates 

 may be much wider than long and without any trace of lobing. The 

 secondary plates have 3 to 5 ver}'^ irregular lobes and are not raised 

 internally into a keel as in ^. cristatus. 



Superomarginal plates (21 or 22 in type) forming a rounded bevel 

 in intertrachia, but on outer third of ray strongly arched, with lateral 

 and dorsal surfaces. The plates are usually decidedly wider than 

 long, but they vary in this respect, for one specimen (station 5622) 

 has the plates of the proximal two-thirds of the series as wide as long. 

 They differ from the sui)eromarginals of A. epixanthus in having the 

 entire surface (except on outer third of ray) covered with coarse 

 hemispherical, slightly spaced, granules, those on the border the 

 smallest. The inferomarginals extend slightly beyond the supero- 

 marginals and are closely covered with similar granules, which are 

 coarsest on the rounded margin of the ray and decrease in size toward 

 the inner margin. In epixanthiis the inferomarginal and superomar- 

 ginal -granules are very much fewer and more spaced. They do not 

 cover the whole surface of the plate thickly. On the distal plates the 

 granules are fewer and scattered. The outlines of the marginal 

 plates and the gi'anules are partly visible without drying the speci- 

 men. Terminal plate pentagonal to ovoid, as long as broad, or 

 broader than long, with 2 stubby terminal spines. The last 3 or 4 

 pairs of superomarginals are in contact mediallj^ 



Actinal intermediate plates slightly convex, rather irregular, in 

 about 8 chevrons, the series of plates adjacent to the adambulacrals 

 extending to the seventh to ninth inferomarginal. They are closely 

 covered with coarse spaced granules, those in the center being much 

 coarser than the peripheral. In ejnxanthtis the large granules are 

 fewer, and the tiny immersed granules in the majority. Many of the 

 plates adjacent to the adambulacrals bear 1 to 3 small 2-jawed pedi- 

 cellariae slightly smaller than the heaviest granules and similar in 

 form to the abactinal pedicellariae. 



Adambulacral plates slightly longer than wide, with a curved or 

 slightlj^ angular furrow margin, or occasionally a nearly straight 

 margin, bearing a comb of 6 to 9, usually 7 or 8, slightly divergent, 

 slender, tapering, but also compressed, bluntly-pointed furrow spines, 

 webbed for half their length. The margin of the comb is curved, 

 the mesial spines being the longest and the laterals the shortest. 

 At the adoral end of the series there is usually a rather long, slender, 

 2-jawed forcipiform pedicellaria, set back slightly, the jaws being 

 very narrowly spatulate and about as long or a little longer than 

 the adjacent adoral furrow spine. The pedicellaria is larger than the 

 homologous pedicellaria of eplxanthus. One to 3 similar pedicellariae 

 stand on the surface of the plate sometimes in a longitudinal series. 

 Two or 3 short, blunt, tubercular unequal spines form a series back 



