STAEFISHES OF THE PHILIPPINE SEAS. 377 



cral spine, longer than the 2 furrow spines. F. halansae is a thickset 

 form with less regular, more tumid abactinal plates, which, judging 

 from Perrier's description (1875, p. 178) and Koehler's figures (1910«, 

 pi. 18, figs. 7 and 8) does not differ very markedly from variations of 

 F. milleporella. F. eusticha differs from F. andamanensis in having 

 slenderer rays, regularly arranged abactinal plates, large marginal 

 plates, and a different adambulacral armature. 



I might add that the presence of pedicellariae forms a distinguish- 

 ing characteristic if I were certain that these are constant. A speci- 

 men of F. japonica herewith recorded is supplied with similar pedi- 

 cellariae. 



FROMIA HEMIOPLA Fisher. 



Plate 95, fig. 3 ; plate 105, fig. 2 ; plate 106, fig. 3 ; plate 107, figs. 2, 4. 

 Fromia hemiopla Fisher, 1913c, p. 214. 



Diagnosis. — Differing from F. armata Koehler (Andaman Is- 

 lands) in the absence of abactinal conical tubercles, and the slighter 

 development of the marginal tubercles; differing from F, inille- 

 porella in having 1 or more tubercular granules in the center of 

 the marginal plates of the distal three- fourths or half of ray, in 

 having slenderer rays, and broad, but thin, spatulate furrow spines. 

 R==36 mm., r=9 mm., R=4 r; breadth of ray at base, 10 mm. 



Description. — Abactinal plates irregular as to form and arrange- 

 ment, convex, the granules small, not crowded, even a trifle spaced 

 and usually very slightly larger on middle than periphery of plate. 

 Granules surrounding pores not larger than others. 



Marginal plates convex, the granules increasing in size toward the 

 center, where the plates of at least the distal half of ray bear 1, 2, 

 or even more enlarged tubercular granules, there being as high as 

 5 to 10 on the distal marginals of the type. The first half dozen 

 plates usually lack a tubercle, and the tubercles become a trifle more 

 prominent as the end of the ray is approached. Superomarginals 19 

 or 20 ; inf eromarginals about 23 or 24. Here and there in the supero- 

 marginal series a small plate is wedged between 2 large ones, but 

 there is no regularity of occurrence ; the small plates may be entirely 

 absent. A series of rather prominent intermarginal pores is present. 



One series of slightly tumid actinal intermediate plates extends 

 three-fourths the length of ray; another series about half, and a 

 third series, at the base of ray, comprises a few plates onlj'. Proxi- 

 mally 2 series of pores, becoming 1, which extends as far as the inner 

 actinal intermediate series of plates. Granules of actinal interme- 

 diate plates becoming slightly larger toward the center of plate 

 where, distally, they are sometimes subtuberculate. 



Adambulacral plates with proximally 3 or 4, or near the end of 

 the ray 2, broad, flat, subtruncate (spatulate) furrow spines, the end 

 of the series with a curved contour and part or all of the aboral 



