STARFISHES OF THE PHILIPPINE SEAS. 99 



form an angular series deep in the actinostome and between these 

 and the superficial spines are 2 or 3 irregular series of intermediate 

 spines. 



Actinal intermediate plates extending in a single series to within 

 8 inferomarginal plates of the tip of ray and in a double series onlj^ 

 as far as third. Back of the mouth plates and corresponding to them 

 is a pair of intermediate plates, but between these and the margin 

 is an odd interradial series of plates meeting the suture between the 

 TWO first inferomarginals, as in Blah'mster^ Leptychaster^ and several 

 other Astropectinidae. Exclusive of the plates inmiediately adjacent 

 to the adambulacrals, each interradius has 17 intermediate plates. 

 A majority of those adjacent to inferomarginals, both on rays and 

 disk, bear a prominent fasciculate pedicellaria with 6 or more taper- 

 ing, slender spiniform jaws, surrounding a deep central pit in the 

 plate. These are surrounded b}'' a number of divergent spinelets 

 like the calyx of a flower, the whole forming an ornate, paxillalike 

 structure. The other interradial plates bear a long slender central 

 spine, surrounded by numerous shorter spinelets, resembling those 

 of the general surface of inferomarginal plates. The intermediate 

 plates all have fairly high tabula. A few of the intermediate plates 

 of haioaiiensis have an inconspicuous pedicellaria with about 5 

 spiniform jaws on one side of tabulum, not a prominent central one 

 involving the central spinelets of the plate, as in diploctenius. 



Madreporic body small pentagonal, situated about twice its diam- 

 eter from marginal plates and traversed by fine striae proceeding 

 from the middle of the adcentral side. 



Color in alcohol, dark brown : dried, sepia brown. 



Type.— CQ.t. No. 30516, U.S.N.M. 



Type-locality. — Station 5272, China Sea, vicinity of southern 

 Luzon (lat. 14° N.; long. 120° 22' 30" E.), 118 fathoms, mud, shells, 

 coral sand, bottom temperature 57.4° F. ; 1 specimen. 



DwtHbution.—ls-nov^'n only from type-locality. 



Remarks. — The foregoing diagnosis and description has com- 

 pared this form with the only other known species of the genus. It 

 is interesting to note how closely the two forms have followed the 

 same type of structure while differing in nearly every detail. At 

 first glance the two seem to be the same, but such is undoubtedly 

 not the case. 



This species is another instance of the general similarity of the 

 Hawaiian and East Indian faunas. 



