3 
86 ‘‘ ENDEAVOUR ” SCIENTIFIC RESULTS. 
granules .30-.90 mm. in diameter, among which are a few 
insignificant, minute plates; the granules are low, hemi- 
spherical, with rough, or prickly surface. Radial shields. 
approximate in pairs, 10-12 mm. long by 2-2.5 mm. wide 
distally, more or less concealed. Arms sharply distinct from 
disk, the dorsal surface and sides covering by alternating 
half-circles of glassy hook-bearing, and opaque, smooth 
granules ; the half-circles are not at all sharply defined under 
a lens but nevertheless give an appearance of fairly uniform 
annulations. Genital slits only about 2 mm. long, but quite 
wide. Madreporite small but very distinct, just outside the 
mouth frame ; in the holotype, there are two, not in adjoining 
interradii, but one is evidently smaller and out of place. Oral 
surface and lower surface of arms, uniformly and _ finely 
granulated. Teeth, teeth-papillae and mouth-papille numer- 
ous, similar, spiniform ; teeth somewhat larger in every way 
than the others. First tentacle-pore of arm with 3 or 4 short, 
stout, spinulose tentacle-scales ; second with 6 or 7, third 
with 8, succeeding pores with 8, 9 or 10, nearly to middle of 
arm, when the number begins to drop rapidly and the scales: 
become more and more like the hooks on the lower ends of the 
half-circles of hooks, until at the tip of the arm the tentacle- 
scales are no longer distinguishable. Colour (in alcohol), 
brownish-yellow ; when dry, considerably lighter. Four 
specimens. 
This is a very distinct species, remarkable for the large 
number of tentacle-scales. The disk covering too is character- 
istic, obviously different from that of any of the previously 
known species. The genus is an East Indian one, reaching 
Sagami Bay, Japan, on the north and now shown to reach 
Tasmania on the south. The specimens from off Cape Everard, 
Victoria, are only 9 mm. across the disk and the maximum 
number of tentacle-scales seems to be 7. 
Locs.—East of Flinders Island, Bass Strait, 80-300 fathoms.. 
South-east of Cape Everard, Victoria, 200 fathoms. 
Family OPHIACANTHIDA. 
Genus OpHIACANTHA, Miiller and T'roschel. 
OPHIACANTHA HETEROTYLA, H. L. Clark. 
Ophiacantha heterotyla, H. L. Clark, Mem. Austr. Mus., iv., 
11, 1909, p. 542. 
This is a little individual, not 3 mm. across the disk, but 
there seems no doubt of its identity. 
Loc.—Between Devonport and Launceston, Tasmania. 
