SEA LILIES, STARFISHES, ETC. CLARK. 63 



and heavy, forming a wide-meshed network with rather large 

 papular areas ; wherever two or more plates meet is an 

 elevation bearing a cluster of 2-12 stout, sharp spines, .5-1 

 mm. high ; the papular areas contain 12-15 or more papulae ; 

 neither spine-clusters nor papulae show any serial arrange- 

 ment. Actinal surface somewhat flattened ; adambulacral 

 plates very numerous ; their armature shows some diversity ; 

 well up in the furrow is a sharp, slightly curved spine, below 

 which is a second larger and somewhat blunter and straighter 

 one ; below the latter is, generally, a similar but sHghtly 

 larger spine, about 3 mm. long, which stands on the furrow 



Fig. 8.x5. 



margin and just outside of it, on the actinal surface of the plate 

 is a similar but much shorter spine ; diversity comes from the 

 fact that there may be two or even three spines, instead of 

 one on the furrow margin and they may stand side by side 

 or in an oblique row, extending aborally from the margin ; 

 the marginal and furrow-spines are more or less encased in 

 membrane. The actinolateral plates, outside the adambu- 

 lacrals, seem to correspond to them in number, and each one 

 bears a series (transverse to long axis of ray) of 2-3 sharp 

 spines. Papulse are abundant on the actinal surface, but do 

 not occur between the actinolaterals and adambulacrals, nor 

 on the actinal interradial areas. Oral plates not pecuHar, 

 but the lateral spines are not concealed by the thin membrane 

 which unites them. Colour (in alcohol), bright yellow-brown; 

 (dry) similar, but duller. 



Strictly speaking this species belongs in Henricia rather 

 than in Echinaster since the spinelets are in groups and not 

 isolated, but the general appearance is so unlike Henricia 

 that it seems absurd to put it in that genus. It is quite unlike 

 any previousty described Echinasterid and will be easily 

 recognised at once. The smallest of the six specimens at 

 hand has R = 75 mm. ; it is not, however, notably different 



