.:246 ME. H. L. CLARK ON SOME 
described. It is particularly characterised by very flat chisel-like infero- 
marginal, actinal, aud adumbulacral sjiines, but another feature in which it 
differs from South Australian specimens is the absence of shagreen-like 
" pebbled " areas on the lower part of the superomarginal plates. These are 
•quite conspicuous in most of the specimens from South Australia, but can 
barely be distinguished on one or two plates of the specimen from Garden 
Island. It should also be mentioned that the present specimen does not 
seem to have any intermarginal plates, such as occur in some Uniophorse. 
None of the South Australian specimens have the grey colour of U. dijscrita, 
but, owing to the poor condition of the type, this may be of no significance 
^at all. 
OPHIUEOIDEA. 
EURYALE ASPERA. 
Lamarck, 1816, Anim. s. Vert. ii. p. 538. 
A single specimen of this "basket-fish," 20 mm. across the disk, is labelled 
as having been brought from Broome. It is very light-coloured, possibly 
somewhat bleached, but is otherwise in good condition. The species was 
previously known from north-western Australia only from two young speci- 
-mens taken by the ' Gazelle.' 
OpHIACTIS SAVIGNYl. 
Ophiolepis samgmji MiiUer & Troschel, 1842, Syst. Ast, p. 95. 
Op/iiactis scwiffni/i 'Liungm&u, 1867, Ofv. Kong. Vet.-Akad. Fbrh. xxiii. p. 323. 
A single specimen of this tropicopolitan species is in the collection from 
^Vooded Island. It has six arms and the disk is 3 mm. across. 
Ophiothrix michaelseni. 
Koebler, 1907, Fauna Sudwest-Australiens : Ophiuroidea, i. p. 250. 
While I do not feel at all sure of the validity of this species, since the 
■section of the genus to which it belongs is in very great confusioUj there is 
a specimen of Ophiothrix at hand, taken at Garden Island near Fremantle, 
which is almost certainly identical with Koehler's specimens and may well 
bear their name until the group is revised. It is 13 mm. across the disk, and 
although the arms are all broken, enough is left (65-115 n.m.) to show that 
they are very long. The disk is grey, the arm-spines pale brown, and the 
upper side of the arms is indistinctly banded ^vith dark and light slate-colour ; 
there is a narrow, more or less interrupted, light line along the middle of the 
uppei'-arm surface. 
Ophiothrix spongicola. 
Stimpsoa, 1855, Proc. Acad. Nat. Sci. Philad. vii. p. 385. 
This is one of the few characteristic species of the southern coasts of 
J\.ustralia which occur at the Abrolhos. In the present collection there are 
