STARFISHES OF THE PHILIPPINE SEAS. 363 



abactinal or actinal plates, and in having more numerous abactinal 

 I)lates, forming a very regular triangular reticulum, between which 

 are triangular papular areas arranged in regular series parallel to 

 the radial series of plates, and much more numerous than in C. 

 schinklellana or C. novae- fju'meae^ or their varieties; R=133 mm., 

 r=9o mm., E=;1.J: r; form massive, pentagonal with slightly arcuate 

 sides Avhicli are perpendicular and formed by the marginal plates 

 and about 1 series of adjacent large papular areas with intervening 

 perpendicular trabeculae (each of which joins the upper end of a 

 superomarginal plate) ; abactinal surface more or less swollen, and 

 marked off into regular triangular papular areas by narrow trabecu- 

 lae; whole surface finely granular with minute 2-jawed granuliform 

 podicellariae ; no spines; actinal intermediate plates sharply marked 

 off by sutural gi'ooves and covered with a close mosaic of unequal, 

 smooth, very compact granules; the 3 chevrons nearest furrow with 

 an odd interradial plate, the others without; furrow comb compact, 

 perpendicular, with 8 to 11 slender spines, the aboral end of 1 comb 

 slightly overlapping the adoral end of the next younger comb. 



Description. — No spines on any plates except the adambulacral. 

 Abactinal surface, which is variably inflated, marked off into very 

 regular triangular papular areas, grouped in hexagons, the. center 

 of each of which is a primary plate, the diagonals (separating the 

 6 triangles of each hexagon) being the slender connecting ossicles 

 or trabeculae. The primary plates are arranged in quincunx in very 

 regular series parallel to the median radial, on either side of which 

 3 series can be plainly seen (especially if specimen is dry), with 2 

 more in the angle made by the interradial line (which is marked by 

 a definite series of ossicles and connectives) and the marginal plates. 

 These last 2 rows are not so regular. At the center of disk the pri- 

 mary radial and basal plates mark off a stellato-pentagonal apical 

 area, within which is a cycle or pentagon of 10 plates, inclosing an- 

 other of 5 plates, the center of the latter being occupied by the cen- 

 tral plate, and one of its sides by the anal aperture. These plates are 

 all connected by regular trabeculae. Between each row of primary 

 plates is a double row of the triangular papular areas containing 

 50 to TO pores (sometimes less in small areas). The areas just above 

 the superomarginal plates are larger than the rest, containing up- 

 ward of 150 pores, and instead of being triangular are roughly loz- 

 enge shape or (transversely) elliptical. The trabeculae are covered 

 with ven' small, crowded, polygonal, unequal, or subequal granules, 

 slightly convex in alcoholic specimens, strongly convex to subconi- 

 cal when dried. On the papular areas the granules are slenderer 

 and longer, in the form of tapering minute s])inelets (when speci- 

 men is dry). In alcoholic specimens they appear very similar to the 



