SEA LILIES, STARFISHES, ETC.—CLARK. 3] 
uniformly to a blunt point. Disk and rays, within area 
bounded by superomarginal plates, covered by small (little 
exceeding 1 mm. in diameter of the slightly capitate top), 
crowded paxille, each of which bears numerous (50-100) 
short, slender, delicate, somewhat glassy spinelets ; paxille 
without definite arrangement, except along sides of rays, 
where series parallel to the width-diameter of the supero- 
marginal plates may be distinguished ; there are usually 2, 
but may be 3 such series adjoining each superomarginal plate. 
Madreporic body very large, 14 mm. across, carrying about 
50 paxille which tend to conceal it very completely ; these 
paxillee are lower and less perfectly formed than those on the 
disk itself; the outer margin of the madreporite is 9 mm. 
from the inner margin of the superomarginal plates. The 
latter are 46.or 47 in number on each side of each ray; those 
near the interradial angle are about 2 mm. long by 6 mm. 
wide, but as one passes distally length increases and breadth 
decreases and near the middle of the arm they are 3 mm. long 
and 4 mm. wide; the length never quite equals the width ; 
all of the superomarginals are densely covered by minute 
spinelets like those of the paxille; there are no spines or 
enlarged spinelets anywhere on the abactinal surface. 
Terminal plate small, slightly swollen, smooth, pentagonal- 
cordate, with rounded angles. 
Inferomarginals correspond in number and position with 
the superomarginals but are much larger and project con- 
spicuously beyond them, except near tip of ray ; the inter- 
radial ones are 2 mm. long by 9 mm. wide, while those near 
the middle of the arm are 3 mm. by 6 mm. ; their covering 
consists of a close coat of short, flattened, blunt spinelets, 
much coarser than those on the superomarginals. Fasciolar 
channels between marginal plates neither peculiar nor con- 
spicuous. Actinal intermediate plates wanting at tip of ray; 
the series adjoining the adambulacrals begins at about the 
tenth inferomarginal from tip ; a second series begins at about 
the 17th-20th inferomarginal from tip ; a third at about the 
30th ; the last becomes irregular and difficult to follow before 
reaching the mouth. The remainder of the large, actinal inter- 
radial areas are covered by similar but smaller plates forming 
parallel, radial series between adambulacral and_ infero- 
marginal plates ; these radial series are fairly regular ; usually 
a distinct unpaired series of about 5 plates occupies the 
midradial lines, but reaches little more than half-way to the 
inferomarginals. All the actinal plates are covered, like the 
inferomarginals, with short, flattened, rough spinelets, wider 
and blunter on central area of each plate than along its 
margins. There are no spines or enlarged spinelets anywhere. 
