STARFISHES OF THE PHILIPPINE SEAS. 245 



transverse edges, where 3 or 4 granules are smaller than the central 

 ones and slightly spaced. The primary radial plate has 18 to 25 

 peripheral granules, and the number decreases to about 10 on the 

 distal plates. The adradial plates are similarly constructed, but 

 have only 4 to 8 central granules proximaliy and 1 or 2 distally and 

 fewer peripheral granules than have the radial plates. The second 

 longitudinal series has the peripheral gra>iules abutting against the 

 adradial plates much enlarged, but the others about the size of those 

 on the adjacent interradial plates. These plates have a curious one- 

 sided appearance, which is more accentuated in the type than in 1 or 

 2 other specimens from the same station. The great difference in 

 size between the peripheral granules of the transverse margins and 

 those of the lateral longitudinal margins is very striking. The pri- 

 mary' basal plates are larger than the primary radial in the type 

 and subequal in other specimens from the same station. As men- 

 tioned above, the interradial plates are also elevated and covered 

 Avith relatively few hemispherical granules, sometimes truncate on 

 the peripliery of plate. No abactinal pedicellariae. 



Seen from the coelomic side, the hexagonal radial and adradial 

 plates are joined by stout intermediate ossicles with a minutely 

 thorny surface. Consecutive median radial plates are joined by a 

 pair of ossicles (as in symboUcus), and there are 2 on either side, 

 making 8 touching each plate. The adradial plates lack the ossicles 

 binding consecutive plates, so that there are only 4 (the laterals) 

 around each plate. The plates of center ol disl?: are also joined by 

 the internal ossicles. Papulae on center of disk and in 4 zigzag 

 series along each radial area ; 6 about each radial and adradial plate. 



Superomarginal plates all longer than wide as seen from above and 

 rather evenly and fully curved from the inner to the outer margin, 

 the lateral face being only a trifle narrower than the dorsal. Plates 

 13 to a ray in type, increasing in size up to the third, which meets 

 its fellow medially. This plate is slightly longer than wide (or the 

 2 dimensions subequal) as seen from above, and thence the plates are 

 increasingly longer than wide. The iirst 3 plates are shorter than 

 the chord of the extreme width, however, and in the fourth the 

 length about equals the chord of width. Plates covered with slightly 

 spaced, depressed subspherical granules subequal to those occupying 

 the center of abactinal plates. The sutures between the plates are 

 marked by well-defined grooves. Terminal plates as broad as long 

 (or broader), blunt distally but pointed proximaliy. 



Inferomarginals nearly or quite corresponding to superomarginals, 

 the length of the second equal to chord of width, but all normally 

 longer than wide as seen from below. Ten inferomarginals, begin- 

 ning with the third, corresponding to 32 adambulacrals. Distal 

 inferomarginals commonly twice as long as extreme width. Granu- 

 13434— Bull. 100—19 17 



