ECHINODERMATA — CLARK. 533 



and deeply furrowed on the actinal side. A large cluster of 

 pedicellarite covers about one half of the upper side of each spine; 

 these clusters spread somewhat on to the membrane between the 

 spines, but scarcely extend on to the actinal side. The series of 

 spines just below the marginal fringe is placed close to the latter, 

 but the spines are somewhat shorter and more slender, are not 

 connected with each other by any membrane, and carry no pedi- 

 cellarise. The third series of spines does not begin quite so near 

 the base of the ray as the other two, and extends only to within 

 1 5 or 20 mm. of the tip. These spines are decidedly smaller than 

 those of the second and marginal series, but are much stouter 

 than the adambulacral spines. They are much less numerous 

 than the latter, however, for at the middle of the ray there are 

 three adambulacral spines to each one of the third actinal series. 

 Oral plates, each with two marginal spines at the inner end, of 

 which the inner one is much the larger, A still larger superoral 

 spine is present on each plate, and there are also two or three 

 very large but slender pedicellarise at the inner end. Madrepore 

 plate 3 mm. in diameter, free from spines, situated nearer the 

 margin than the centre of the disc. Colour of alcoholic, and dry, 

 specimens deep yellowish-brown. 



3 specimens from Station 36. OS Botany Bay, 20-23 fathoms; 

 sand to rock. 



1 specimen from Station 44. Off Coogee, 49-50 fathoms; fine 

 sand. 



10 specimens from Station 1 



This species is surprisingly near Asterias eustyla, Sladen, known 

 only from the vicinity of Tristan da Cunha. In a specimen of 

 duhia of the same size as the only known specimen of eustyla 

 (R^60 mm.), the following differences are obvious : the rays of 

 c??t6ia are much broader and the disc larger than in eustyla, r=ll 

 instead of 7 mm. and br. = 13 mm. instead of 8 or 9; there are in 

 duhia only two series of inferomarginal spines, which are much 

 flattened and with a deep longitudinal furrow on the actinal side, 

 and there is a considerable space between these spines and the 

 adumbulacral series, while in eustyla there are three t-eiies of 

 spines, only slightly ilattened and not furrowed, and closely 

 crowded against the adambulacral series ; finally, the adambu- 

 lacral spines are longer and the large forficiform pediceilaiise are 

 more numerous in duhia than in eustyla. From Asterias mollis, 

 Hutton, of New Zealand, duhia may be at once distinguished 

 by the blunt and only slightly tapering rays, the much heavier 

 skeleton, the much larger wreaths of pedicellarite, the much larger 

 but more slender forticiforni pedicellariee and the more numerous 

 iuframaiginal spines ; the general facies of the two forms is thus 



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