RECORDS OF W.A. MUSEUM. 
[i6i 
PHYLLACANTHUS ANNULIFERA. 
CidaHtes annuUfera, Lamarck, i8i6 Anim. s. Vert., vol. 3, p. 57. 
Phyllacanthus annuUfera, A. Agassiz, 1872. Rev. Ech., Pt. i, p. 150. 
There is a beautiful cidarid in the collection which seems to 
belong to this species although the coloration is different from that 
of any I have seen. The test is 30 mm. i.d., and the 
primaries, which are very thorny and quite free from foreign 
matter are about 40-45 mm. long ; the collar is 4 mm. high. The 
ocular plates are all insert, but II and III are only barely so. 
The test is cream-colour, or almost pure white on the bare 
median ambulacral area ; the miliary and secondary spines are 
almost white, or at least very light coloured, with a broad longitu- 
dinal stripe on their upper (or outer) surface of bright brown, which 
is darkest on the smallest spines and palest on the largest ; actinally 
the brown is almost brownish-red. The primary tubercles and the 
collars of the primaries are bright pinkish lavender. The primary 
spines are light coloured with a markedly greenish cast, and with 
almost eight bands of dull purplish-red ; these bands are broken on 
the sides of the spine and are faint on the lower surface ; the thorns 
on the actinal primaries are red, often with white tips, and the 
primaries close to the actinostome have the entire tip red. 
Port Hedland, W.A. One specimen, No. 4026. 
TRETOCIDARIS BRACTEATA. 
Dorocidaris bracleaia, A. Aga§siz, 1879. Proc. Amer. Acad., vol. 14, p. 197. 
Tretocidaris bracteata, H. L. Clark, 1907. Bull, M.C.Z., vol. 51, p. 206. 
These specimens are larger than any previously known, having 
h.d.=35 mm. The primaries are 50 mm. or more in length, and 
are 4 mm. broad near the base ; they are somewhat flattened there 
and the longitudinal ridges are very prominent ; these latter are 
broken up into flattened truncate or sharp teeth, making the spines 
conspicuously and coarsely rough. The collar on the primaries is 
very low, which is one of the best characteristics of the species. 
Another useful character is the spotting of the primaries, at least 
near base, with longitudinal series of red-brown dots. The pink 
secondary spines are also a noticeable character, those of the inter- 
ambulacra in these specimens being evidently tipped with yellowish. 
The large globiferous pedicellariae are very uncommon but are to 
