SEA LILIES, STARFISHES, ETC.—CLARK. 85 
fifth, 30 mm. ; sixth, 27 mm.; seventh, 37 mm. ; eighth, 30 
mm.; and ninth, 25 mm. Radial shields distinct, well 
separated, but in pairs ; distance between distal ends of a pair, 
6mm. ; width of shield at distal end, 3mm.; distance between 
distal ends, across an interradius, 12 mm. Disk covered by a 
smooth, thick skin without calcareous plates, even at margin ; 
all over the surface, but chiefly along the radial shields, are 
scattered minute, pimple-like elevations, not at all crowded, 
but where thickest there may be 7 or 8 in a space 3 mm. square; 
large parts of the surface, especially near margin have none. 
Oral surface covered by the same smooth, thick, non-calcified 
skin, but with no pustules. Madreporite single, small, but 
distinct. Genital slits only 5 mm. long, but very distinct. 
Teeth and teeth-papillze indistinguishable, rather flat, about 
three times as long as wide. Mouth-papille none. First 
tentacle pore of arm without any protecting scale ; succeeding 
pores of basal portion of arm with two small peg-like scales ; 
on first division of arm, there are three scales to each pore, the 
inner one nearly a millimeter long and .50-.66 mm. thick, the 
second about as long, but more slender, the outer distinctly 
smaller in every way ; all three have rough, prickly tips when 
dry. Distally the outer spine disappears and then the second, 
while the inner one becomes transformed into the character- 
istic hook. The half-circles of hooklets are very narrow, con- 
sisting of only 2 series of granules ; they are incomplete on the 
second arm-division and on the first are represented only by 
little patches ; on the third and distal thereto they are com- 
plete. Colour (in alcohol) nearly uniform reddish - flesh- 
colour; the pustules and tentacle-scales are somewhat darker. 
This species is easily distinguished from either of the other 
species in this restricted genus by the characteristic disk- 
covering and the tentacle-scales. It is so utterly unlike any 
other known Australian euryalid that there is no possibility 
of confusion with any of them. 
Loc.—East of Flinders Island, Bass Strait, 100-300 fathoms. 
Genus ASTROTHAMNUS, Matsumoto. 
ASTROTHAMNUS RUGOSUS,! sp. nov. 
(Plate xxxv., fig. 1-2.) 
Disk 20 mm. in diameter ; arms 5, approximately 140 mm. 
long, but the tips are so closely spirally coiled, it is not possible 
to measure them exactly. Disk covered by coarse, rounded 
1. Rugosus=rough ; in reference to the rough character of the disk- 
covering. 
