STARFISHES OF THE PHILIPPINE SEAS. 275 



prising 7 to 9 longitudinal series of plates, the plates themselves 

 being smaller; triangular interradial areas large, the base comprising 

 the 6 median interbrachial superomarginals (about 4 in euryplax) ; 

 plates of papular areas smaller than in euryflax^ hexagonal, a few 

 of the proximal median radials being slightly wider than long and 

 some of the laterals roundish. Proximal median radial plates with 

 8 to 10 circular depressed central granules (in 3 transverse series) 

 and 15 or 16 slightly smaller peripheral ones. A specimen from sta- 

 tion 5625 has 2 to 5 central and 10 to 12 peripheral on the largest 

 radial plates. Plates low, the top of the granule being about 1.5 

 times its width above the integument. Interradial plates in regular 

 chevrons pointing to center. No abactinal pedicellariae. 



Superomarginal plates broad, very faintly convex, and with an 

 abrupt rounded angle at ambitus. They form a slightly raised 

 border to disk, and one which is a trifle beveled; fifth superomar- 

 ginals the largest, meeting medially, the dimensions being shown by* 

 the figures. Granules, depressed hemispherical, slightly larger than 

 on neighboring abactinal plates, slightly spaced, with a regular 

 beadlike marginal series. Superomarginals 28 in cotype. Terminal 

 plate longer than wide, the distal end broad and subtruncate, the 

 inner half of plate tapering to a blunt point. 



Inferomarginals projecting slightly beyond superomarginals in 

 interbrachia and on base of rays, and encroaching inward toward 

 center of disk, interradially about as much as superomarginals. 

 Fourth plate slightly longer than width of ventral face. The length 

 remaining the same to about the middle of ray, but the width rapidly 

 diminishing. In euryplax^ in which the inferomarginals are larger, 

 the length does not exceed the width of the ventral facet until the 

 seventh or eighth plate is reached. The 10 plates nearest middle of 

 ray correspond to 18 or 19 adambulacrals. A shallow sulcus along 

 the side of ray and disk, not so well marked as in euryplax. Gran- 

 ules are hemispherical, similar to those of actinal interradial areas ; 

 not tuberculate on ambitus, as in euryplax. No marginal pedi- 

 cellariae. 



Actinal intermediate plates extending to fifth inferomarginal, 

 there being 4 or 5 chevrons in each interradial area, with an odd 

 interradial plate at the point of each chevron. Granules hemi- 

 spherical, slightly spaced or touching, and increasing slightly in size 

 toward furrow. One or 2 small 2-jawed pedicellariae are present in 

 "6 interradii. 



First 7 or 8 adambulacrals of type with 8 (rarely 7) regular, short, 

 blunt, 4-sided, slightly tapering furrow spines, which increase to 10 

 (rarely 11) on the ray. In the cotype tlvj maximum number is 13 

 or 14. Angle on margin of plate first shoAvs at fourth or fifth plate 

 and rapidly increases in prominence, the adoral facet of the apophy- 



