STARFISHES OF THE PHILIPPINE SEAS. 499 



Distribution. — Philippine and Molucca Islands, 105 to 298 fathoms, 

 on sand. 



Specimens exannined, — In addition to the type, 1 specimen, and 

 fragments from the following stations : 



Station 5217, between Biirias and Luzon, 105 fathoms, coarse gray 

 sand, 1 specimen. 



Station 5417, between Cebu and Bohol, 165 fathoms, gray mud, 

 sand, bottom temperature 54.4° F. ; 4 rays. 



Station 5621, Molucca Islands, off Molucca Passage, 298 fathoms, 

 gray and black sand ; 4 rays. 



Subfamily Pedicellasterinae Fisher.^ 



Genus PEDICEIXASTER Sars. 



Pedicellaster Saks, Oversigt af Norges Echinodermer, 1861, p. 77. Type, 

 P. typicus Sars. 



PEDICELLASTER CHIROPHORUS Fisher. 



Plate 142, fig. 2 ; plate 155, figs. 2, 2a-b. 



Pedicellaster chirophorus 1917&, p. 93. 



Diagnosis. — Rays 5. R=27 mm., r=4 mm., R=7 r± ; breadth of 

 ray at base, 4.5 mm. Pays slender, tapering, disk small; plates cruci- 

 form, in regular series, each bearing a short thorny spinelet and l*to 

 3 ovoid f orcipif orm pedicellariae. Adambulacral armature : a trans- 

 verse row of 3, then ^, spinelets 2 to 3 times longer than those of the 

 adjacent actinal and marginal plates, and here and there along the 

 ray a large unguiculate pedicellaria usually borne on or near the 

 furrow margin; 5 oral spinelets. 



Description. — Plates of ray 4-lobed or 3-lobed and arranged in 

 longitudinal and less regular transverse series. There is a midradial 

 or carinal series, a superomarginal, inferomarginal, and 2 actinal 

 intermediate series. Between the carinal and superomarginal^ series, 

 which are regular, is a zigzag series of dorsolateral plates, or what 

 might equally well be considered 2 series of 3-lobed plates alternating 

 in position, with reference to the plates of the neighboring series. 

 At the base of the ray an elliptical secondary plate is interpolated 

 (usually) between the alternate adradial plates and the carinals 

 and between the other dorsolaterals and the superomarginals. A 

 similar plate connects the proximal superomarginals with the corre- 

 sponding inferomarginals. On the disk there are 2 or 3 plates of a 

 third actinal intermediate series adjacent to the adambulacral plates. 

 The first intermediate series reaches about half the length of ray, 

 the second a little less than one-third. The inferomarginals are 

 therefore contiguous to the adambulacrals on the outer half of the 



1 Fisher, 1918, p. 108. 



