STARFISHES OF THE PHILIPPINE SEAS. 249 



ing granules. Terminal plate fairly largo, longer than wide, with 

 about 4 tubercles on the end. 



Inferomarginals, corresponding to superomarginals, encroach a 

 trifle less upon the actinal area of rays than the superomarginals 

 upon abactinal, and the proximal plates are slightly less tumid than 

 the corresponding superomarginals. The plates are covered with 

 granules similar to those of the lateral surface of superomarginals, 

 and the last 6 or 7 bear a subcentral enlarged granule. 



Actinal intermediate plates in 3 chevrons, the plates covered with 

 spaced, prismatic, or four-sided granules 9 to 12 to a plate, rarely 

 more or fewer. The plates reach to the proximal end of the third 

 inferomarginal. In each chevron one plate is generally interradial 

 in position, but there is usually an even number of plates in each 

 chevron. The plate just back of the combined mouth plates is much 

 smaller than its neighbors and has 4 granules. 



Adambulacral plates about as wide as long, with a ver}' slightly 

 convex furrow margin bearing 4 or 5 subequal, slightly compressed, 

 four-sided, untapered, blunt furrow spines, about as long as the 

 plate and forming a comb with slightly divergent or parallel com- 

 pact teeth. Subambulacral armature: an oblique, longitudinal, 

 slightly curved series of 4 or 3 four-sided short spines, stouter and 

 a little shorter than the furrow spines and spaced from them. Back 

 of these at outer end of plate is a row of 3 or 4 elongate granules or 

 sometimes distally 5 or G granules in 2 series, or forming a circle 

 with the inner subambulacral spines. 



Mouth plates small with straight furrow margin bearing 8 spines 

 similar to those of the adambulacrals, but the inner 2 or 3 a little 

 heavier. Parallel to these are 3 to 5 spines in line with the inner 

 series of subambulacrals and subsimilar to them, the outer part of the 

 plate being occupied by 6 or T spines and granules graded in size 

 from the above to the actinal intermediate granules. 



Madreporic body surrounded by 5 plates and situated About half- 

 way between center and inner edge of marginal plates, with a few 

 curved, incomplete, branched striae separated by broad ridges. 



Anatomical notes. — Gonads not yet developed ; intestinal coecum 

 with bifid interradial branches; no superambulacral ]:)lates. The 

 membranous interbrachial septa have relatively few conspicuous 

 calcareous plates, some of them shaped like short spines which pro- 

 ject at right angles to the septum. Ambulacral ossicles with a sharp 

 ridge toward the coelom, which bears on the proximal plates several 

 fine spiculiform prolongations midway between the upper and lower 

 ends. 



ry/;^'.— Cat. Xo. 305-11, U.S.X.M. 



Type-locaUty. — Station 5481, Surigao Strait, oil' Cnbugan (Ji-ande 

 Island. Leyte, 01 fathoms, sand shells, gravel ; 1 .specimen. 



