316 BUIXETIN 100, UNITED STATES NATIONAL MUSEUM. 



Madreporic body surrounded by 5 plates, 3 of predominant size, 

 slightly larger than in A. Uonotics, and with more numerous radiat- 

 ing branched ridges. Three papular pores are found on the ad- 

 central margin, and the surrounding plates bear 1 to 3 granules each. 



Type.— Cat. No. 30556, U.S.N.M. 



Type-locality. — Station 5135, 11.9 miles northeast of Jolo Light, 

 Jolo, Sulu Archipelago, 161 fathoms, fine coral sand, bottom tempera- 

 ture 54.7° F. ; 1 specimen. 



Distribution. — Known only from the type-localit3\ 



Remarks. — This species differs from A. callimorphus and A. lio- 

 notus in having prominent granules and pedicellariae on the abacti- 

 nal plates, and differs further from the latter in several characters 

 enumerated in the diagnosis. A. fsheri Koehler, from 224 to 284 

 fathoms between the Maldives and India, differs from A. callimor- 

 phus, A. lionotus, and A. sphaeriostictus in having a larger disk 

 and shorter vnys, only 7 or 8 superomarginals being in contact medi- 

 ally. Moreover, the superomarginals do not at first increase in size 

 and then gradualh^ decrease; they are very nearly of the same di- 

 mensions up to the eighth, from which they diminish very rapidly. 

 There are several differences in detail (see Koehler, 1909, pi. 2, figs. 

 2 and 3). It is quite possible that flsheri will prove eventually to 

 be the type of a good subgeneric group, as there are now 3 well- 

 marked species with the marginal plates of the type of callimorphus. 



Genus CALLIASTER Gray. 



Calliaster Gray, 1840, p. 280. Type, C. childreni Gray. 



CALLIASTER CORYNETES Fisher. 



Plate 86, fig. 1 ; plate 87, fig. 1 ; plate 93, figs. 5, 5a. 



Calliaster corynetes Fisher, 1913a, p. 644. 



Diagnosis. — E=40 mm., r=15 mm., R=2.66 r; breadth of ray at 

 base, 18 mm. Disk large, rays rather slender and blunt, the inter- 

 brachia being wide and rounded. Marginals very massive, wider in 

 outer part of ray than the abactinal area, very tumid, each bearing a 

 very robust, rigid, blunt spine (2 on first plate), the general surface 

 of the plates being smooth ; terminal plate large with 5 heavy spines ; 

 inferomarginals with 2 stout spines and a few pedicellariae; abac- 

 tinal plates smooth, bordered by a single series of flat, flush gran- 

 ules, the 5 primary radials and 1 or 2 other radials, as well as the 

 central plate with a heavy upright blunt spine, the remaining median 

 radial plates and most of the larger plates of central part of disk with 

 a central tubercular granule; numerous very broadly spatulate, folia- 

 ceous pedicellariae; actinal intermediate plates each with a heavy 



