STARFISHES OF THE PHILIPPINE SEAS. 351 



spherical tubercle, very much larger than the granules surround- 

 ing it. 



Between the primary and secondary plates the integument is 

 thickly beset with very small, unequal, convex, subcorneal, or even 

 spinuliform granules, largest on the center of the small intercalary 

 ossicles and smallest on the margin of the papular pores. Small 

 pedicellariae with spatulate jaws slightly higher than wide, or some- 

 times wider than high are scattered among the granules, which they 

 exceed little or not at all in size. Papular pores, rather evenly dis- 

 tributed, occupy all this granular area among the primary and sec- 

 ondary plates, even to the tip of ray, and likewise between angular 

 dorsal extensions of the superomarginal plates. There is no subdi- 

 vision into areas. 



If a portion of the dorsal surface is cleared of granules the primary 

 plates are seen to have a scalloped or crenulate margin best marked 

 on the radial series. The secondary plates also usually have 5 to 7 

 short lobes or indentations on the margin. The intercalary ossicles 

 are of various sizes and forms, often elongate and do not extend to 

 the coelomic side of the body wall. The smaller the ossicle, the more 

 superficial it is. The body wall is very thick (5 or 6 mm.). Only 

 the primary and secondary plates form its entire thickness. Viewed 

 from the coelomic side the plates form regular series in quincunx. 

 The primary plates have, on either side, 2 elliptical slender ossicles 

 which bind each to 2 plates on that side. The plates are subequal 

 and transversely elongate as viewed from the inner side, but the 

 superficial end of alternate plates (or sometimes 2 together) may be 

 of only secondary size, or even be obscured by the intercalary gran- 

 ules. Such are the secondary plates which form longitudinal series 

 with the primary plates. The secondary plates, which are hetween 

 the longitudinal series, abut against the small connecting ossicles of 

 the coelomic side, so that their inner ends are not seen, being obscured 

 or covered by these lateral connecting ossicles. 



The arrangement of the abactinal plates is similar to that in the 

 genus Asterodiscus, and unlike that of Oreastev. 



Ambitus bounded by superomarginals, the inferomarginals being 

 actinal. Superomarginals 16 to 18, wider than long, convex, unequal, 

 and triangular in general form, the apex dorsal. The largest plates 

 are near the middle of ray, whence they decrease in size toward 

 either end of the series. The largest are about 7 mm. wide by 4 

 long, and are covered by polygonal granules similar to those of the 

 dorsal primary plates, largest in center and decreasing rapidly in 

 size toward the periphery. Between the dorsal angular ends of the 

 superomarginals are numerous papulae forming a serrate border to 

 the abactinal papular area. These papulae sometimes extend nearly 



