174 A. E. Yerrill — Revision Genera and Sjyecies. of Starfishes. 



Pedicellariae of a simple papilliform structure occur on some of the 

 upper plates. The lower marginal plates have two or three spines 

 in a horizontal row ; one distally. 



The adambulacral plates have a divergent or palmate-series of 

 furrow spines and a larger spine on the outer actinal end ; many 

 have also a central pedicellaria wnth spoon-shajied blades. 



The actinal plates are numerous, in chevrons, and extend to about 

 the 13th or 14th adambulacral plates; they are covered with a 

 granulose membrane, and some bear papilliform pedicellariie. The 

 dentary plates are very prominent and bear large granules actinally, 

 but the oral spines are large. The ambulacral feet have a terminal 

 sucker. 



Antheniaster sarissa (Alcock). 

 Anthenoides sarissa Alcock, Ann. Mag. Nat. Hist., xi, p. 99, 1893. 



Andaman Sea, 139 to 250 fathoms. 



Siibfamily HIPPASTERIIN^, nov. 



This gi-oup is established for those Goniasteridse that have large 

 elongated, divergent, and differentiated adambulacral spines, one or 

 two larger ones situated on the central part of the plate. The dorsal 

 and marginal plates are bordered or covered with large granules 

 and often have one or more central tubercles or stout spines. 

 Bivalve pedicellari?e, often of large size, are usually present. The 

 abactinal plates are thick, closely joined, and polygonal or roundish. 



Hippasteria Caribsea Ver., sp. nov. 



Plate XXVIII. Figures 1, la. 



Form stellate with a rather broad disk and tapered acute rays; 

 disk convex. Radii about as 2 : 1. 



Marginal plates regularly paired, those of the interradial margin 

 nearly square ; all are bordered with coarse rounded granules, and 

 some granules are scattered on the central parts; in some cases these 

 form a central cluster on the lower plates. Most of the upper plates 

 are naked centrally, and rise into a low conical tubercle, often sur- 

 mounted by a small, round, ovate, blunt spine or large granule. 

 Many of the lower plates have a central large bivalve pedicellaria 

 with low, broad blades; their breadth is about half the width of the 

 plates. ^ 



