3 
90 ‘‘ ENDEAVOUR” SCIENTIFIC RESULTS. 
Tasmania, and this individual is also peculiar in the large 
number of disc scales and the short, thorny disk spines ; the 
disk-diameter, however, is only 6.5mm., and I believe the 
peculiarities are associated with youth. The smallest speci- 
men is from east of Maria Island, Tasmania, and still retains 
the large, transparent central plate of the disk, known to be 
characteristic of the very young of some other species of 
Ophiothrix ; its disk spines are quite thorny and relatively 
rather short. Nineteen specimens. 
Locs.—Twenty miles south-east by east of Tasman Head, 
Tasmania, 80-85 fathoms. 
East of Maria Island, Tasmania, 78 fathoms. 
Entrance to Oyster Bay, Tasmania. 
East of Babel Island, Bass Strait, 65-70 fathoms. 
Off Gabo Island, Victoria, 200 fathoms. 
OPHIOTHRIX CSPITOSA, Lyman. 
Ophiothrix cespitosa, Lyman, Bull. Mus. Comp. Zool. 
Harvard, vi., 1879, p. 53. 
These specimens range in disk-diameter from 1.5 to 6mm., 
and in colour from bright reddish-pink to purplish-gray, 
brownish-yellow and nearly white. The disk covering shows 
much diversity also, ranging from a uniform covering of 
minute thorny, somewhat stellate stumps, which even conceal 
the radial shields, to one where the thorny stumps are very 
largely replaced by rough spinelets and the radial shields are 
more or less bare ; there are many intermediate stages. The 
upper arm plates and the arm spines are more uniform, but 
not perfectly so. I cannot see that there is any correlation 
between the characters mentioned and the locality whence 
the specimen came. The seven specimens from off Ballina, 
New South Wales, were all found on the abactinal surface of 
a Sea-urchin (Prionocidaris australis); they are all young and 
are bright reddish-pink, except two which have pale pink 
arms and a light coloured disk hardly tinged with pink. In 
view of the well-known instability of characters in the genus, 
and the present multiplicity of species, I think it best to 
regard all the specimens as O. ce@spitosa and leave it for some 
future worker in Australia to determine whether J am right. 
Forty-one specimens. 
