STARFISHES OF THE PHILIPPINE SEAS. 313 



furrow spines of lionotus being much compressed, broadened at tip, 

 and with the edge to the furrow. The form and position of the 

 subambulacral pedicellaria is also characteristic. The jaws are nar- 

 rower than those of the actinal intermediate pedicellariae, being com- 

 pressed, while in caTlimorq)hu8 the occasional subambulacral pedicel- 

 laria is like those of the actinal intermediate plates. In callimorphus 

 the madreporic body is surrounded by 3 large plates, and in lionotus 

 by 3 large and 2 small ones. 



ASTROCERAMUS SPHAERIOSTICTUS Fisher. 



Plate 81, fig. 2 ; plate 82, fig. 2 ; plate 84, figs. 4, 7 ; plate 94, figs. 1, la. 

 Astroceramus sphaeriostictus Fisher, 1913a, p. 644. 



Diagnosis. — Similar in general appearance to A. lionotus, but 

 differing in having 1 or 2, rarely upward of 5, acorn-shaped, tubercu- 

 lar granules on the middle of the abactinal plates ; numerous abacti- 

 nal, broadly spatulate, or narrowly fan-shaped sugar-tongs pedicel- 

 lariae; more numerous marginal granules, scattered over the entire 

 surface of marginal plates; larger and more numerous actinal inter- 

 mediate pedicellariae and coarser tubercular granules; more numer- 

 ous subambulacral pedicellariae; proximally slenderer furrow spines; 

 commonly only 1 larger subambulacral spine, or if 2, these frequently 

 in a transverse series; slenderer oral spines. R=73 mm., r=22.5 mm., 

 E=3.2-f-r; breadth of ray at proximal end of third pair of supero- 

 marginals (which meet medially) equal to length of first 4^ supero- 

 marginals measured on ambitus. 



Desc?'iption. — Abactinal plates of papular areas subcircular, or be- 

 tween circular and hexagonal, becoming hexagonal on tlie interradial 

 nonpapular areas, bordered by a single moniliform series of very 

 small, thin granules which have a rounded outer edge on the papular 

 areas and are more nearly straight-edged interradially. The center 

 of the plate bears 1 or 2, or on center of disk upward of 5, broadly 

 acorn-shaped, tubercular granules equal in diameter to about 2 mar- 

 ginal granules, but very much more conspicuous, appearing from 

 above like whitish globular beads, though in reality subconical. 

 Many of the plates bear a conspicuous 2- jawed, broadly spatulate, 

 entrenched pedicellaria, often close to a granule or between two. 

 The jaws are often crenulate on the margin and about as high as 

 the granule. The surface of the plate is roughened by very regular 

 uniform blisterlike convexities which have a subhyaline appearance. 

 Papular areas include the center of disk and petaloid radial areas 

 comprising about 7 rows of plates. The papulae are crowded, there 

 being as many as 8 around some of the plates. It should be noted 

 that the abactinal plates are arranged in regular series parallel to 

 the median radial. 



