3 
64 ‘* ENDEAVOUR ” SCIENTIFIC RESULI‘S. 
from the larger specimens, save that the actinal skin is thicker 
and unites and conceals the spines along the furrow more 
fully. 
Loc.—Off Cape Marsden, Kangaroo Island, South Australia, 
17 fathoms. 
ECHINASTER SUPERBUS,! sp. nov. 
(Plates xxiv.-xxv.; Fig. 9-10.) 
R=110 mm.; r=15 mm.: R=7r. Br=20 mm kh 
5.5 br. Br at middle of ray=14 mm.; at tip,4 mm. Disk 
small, not elevated ; rays nearly terete, tapering uniformly 
to tip, somewhat flattened actinally. Abactinal skeleton 
pretty well concealed in the thick skin, but forming a rather 
fine mesh-work, with relatively small papular areas, which 
show no serial arrangement. Papule large and numerous. 
Abactinal spines numerous, isolated, diverse in form, 1-2 mm. 
high, .5-1.75 mm. thick; few have a simple, pointed or blunt, 
tip ; usually it is clavate to a greater or less degree, chisel- 
shaped with one or more notches, or with 5-6 low, rounded 
summits. Madreporite moderately large, very distinct and 
quite near centre of disk. Adambulacral plates numerous, 
Fig. 9.x4. 
about twice as wide as long, very well defined, separated 
from each other by distinct membranous spaces half as long 
as the plates; each plate carries, high up in the furrow, a 
small, curved pointed spine, immediately below which is a 
1. Superbus=very fine; in reference to its notable form and size. 
