SEA LILIES, STARFISHES, ETC. — CLARK. 87 



Family AMPHIURID^. 



Genus Ophiactis, Lutken. 



Ophiactis luteomacflata, H. L. Clark. 



Ophiactis luteomaculata, H. L. Clark, Mem. Mus. Comp. 

 Zool. Harvard, xxv., 1915. 



These specimens were all taken from the large spines of a 

 Sea-urchin (Prionocidaris australis) and as a rule, they were 

 more or less hidden in Barnacles (Acorn-shells) growing thereon. 

 The species was hitherto known only from the holotype taken 

 at the Murray Islands, Torres Strait, in a large sponge. None 

 of the present series is quite so large as the original but they 

 show little structural divergence. The smallest specimens 

 have 6 arms and are clearly reproducing by fission, but the 

 adults are symmetrically 5-rayed. All the specimens are dry 

 and their colours are dull but the adults have the arms 

 pinkish and more or less distinctly banded. The radial 

 shields are not of a different colour from the rest of the disk. 

 An excellent specific character is a dark band or spot at the 

 middle of the larger arm -spines ; all these specimens show it. 



Loc. — Eleven miles south-east of Ballina, New South Wales,, 

 27-29 fathoms. Eleven specimens. 



Ophiactis resiliens, Lyman. 



Ophiactis resiliens, Lyman, Bull. Mus. Comp. Zool. Harvard,, 

 vi., 1879, p. 36. 



One of the individvials from off Kingston, South Austraha, 

 (disk-diameter, 6 mm.) has all the upper arm-plates broken 

 into 2 or 3 pieces. The other specimens, with disk-diameters 

 of 3.5 and 5.5 mm. respectively, are not pecuhar. It may be 

 noted, however, that the species has not previously been 

 known from west of Bass Strait. Three specimens. 



Locs. — Forty miles west of Kingston, South Australia, 30- 

 fathoms. 



Off Cape Martin, South Australia, 21 fathoms. 



