SEA LILIES, STARFISHES, ETC. CLARK. 19 



large size (arms nearly 100 mm. long), but show considerable 

 diversity of colour. One has 38 arms, the greater part of 

 which are light brown, but basally all are heavily shaded with 

 purple, the joints in particular being very dark ; there are 35 

 cirri with about 54 segments ; they are, at base, dorsally pale 

 brown, orally deep purple, but chstally the pui'ple becomes 

 very gradually dominant until it includes all of both surfaces. 

 The second has at least 36 arms (several are missing) which 

 are light brown with more or less of a purplish cast ; basally 

 three of the rays are very deep purple, the other two being 

 decidedly lighter ; there are more than 30 cirri with 47-53 

 segments, light brown at base, but becoming purple distally. 

 The third specimen, from off Noosa Head, Queensland, has 

 only 29 fawn-coloured arms (dry), with a faint pvirpHsh cast, 

 the joints distinctly darker than the segments ; there are, in 

 marked contrast, 27 dull purple cirri, pale brownish at base 

 dorsally (as in the centrodorsal), with 45-47 segments. In 

 this dry specimen the IIIBr series is 2 except in one instance 

 of 4 (3-)- 4) but in the other specimens it is common to have 

 the IIIBr series 4 (3+4), although 2 seems the usual number. 

 The IIBr series, and the IVBr series, when present, are 

 invariably 4 (3+4). The only VBr series noted is 2. 



Locs. — Eight miles east of Sandon Bluffs, New South 

 Wales, 35-40 fathoms. 



Off Noosa Head, southern Queensland, 16 fathoms. 



Zygometra microdiscus {Bell). 



Antedon microdiscus. Bell, Rep. Zool. Coll. H.M.S. "Alert," 

 1884, p. 163. 



Zygometra microdiscus, A. H. Clark, Smiths. Misc. Coll., 1., 

 1907, p. 348. 



This is a small, dry specimen of uniformly pale brown 

 colour, with only 22 arms. There are 8 IIBr series, one of 

 which is 2, the rest 4 (3+4) ; there are 4 IIIBr series, all of 

 which are 4 (3+4). The centrodorsal is low, conical, with 

 25-30 cirri, the longest having more than 40 segments. P2 

 has 27 segments and is relatively large, but is less than 20 mm. 

 long. The occurrence of this species near the Capricorn 

 Islands is quite to be expected, but nevertheless extends the 

 known range of the species far to the south. The present 

 specimen is naturally referred to Carpenter's Antedon multi- 

 radiata, but I think A. H. Clark is quite right in regarding 

 that species as a synonym of Z. microdiscus. 



Loc. — Thirteen miles north-east of North Reef, Capricorn 

 Group, off Port Curtis, Queensland, 70-74 fathoms. 



