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 papule ; 
neither spine-clusters nor papulze 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 slightly 
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. Papulz are abundant on the actinal surface, but do 
not occur between the actinolaterals and adambulacrals, nor 
on the actinal interradial areas. Oral plates not peculiar, 
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 previously described Kchinasterid 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 
