RECORDS OF W.A. MUSEUM. 
[143 
valved pedicellariae sometimes occur with three jaws and they often 
have the jaws as high as wide. It is easy to follow the transition 
from bivalved to spatulate pedicellariae, in this starfish. Both 
kinds of pedicellariae occur on the inferomarginal plates, but the 
bivalved are much the more common. Large spatulate pedicellariae 
occur on many adambulacral plates usually at the adoral end 
between the two series of spines. Groups of 8-20 large bivalved 
pedicellariae cover the surface of the actinolateral plates and give 
them a rough appearance ; some of these pedicellariae have jaws 
more than a millimetre long. 
The colour of this fine starfish in life is said to have been “buff 
above, purple star around mouth.” The dry specimen is light 
reddish-buff above and reddish- white below ; the oral plates and 
first four or five actinolaterals on each side of each ambulacral 
furrow are dull rose-red, but more or less of the centre of each 
actinolateral plate is whitish, the area increasing on the more 
distal plates; inferomarginal and adambulacral spines white. 
Off Port Hedland, W.A. One specimen, No. 4030. Type. 
This beautiful starfish is quite distinct from any other member 
of the genus, yet seems to be a true Stellaster. The inferomarginal 
spines and the numerous sharp conical spinules on the abactinal 
surface are characteristic, while the adambulacral armature and 
the coloration add important distinctive marks. 
OREASTER GRACILIS. 
Liitken, 1871. Vid. Med. f. 1871, p. 260. 
This West Australian specimen equals in size that in the 
British Museum, described by Bell, for R. — 220 mm., but there 
are only 25 or 26 marginal plates as against 30 in that specimen. 
There are no data with the present specimen other than the general 
statement that it is from West Australia. 
OREASTER NODULOSUS. 
Penlaceros nodulosus, Perrier, 1876. Arch. Zool. Exp., vol. 5, p. 53. 
Oreaster nodulosus, Bell, 1884, Proc. Zool. Soc., London, p."66. 
Although this specimen is much larger than either of those 
mentioned by Bell, for R. = 120 mm. as against 70 in his larger 
specimen, there are only two more marginal plates, 19 instead of 17 
