88 ASTEROIDEA. 
1. Zoroaster fulgens. 
Zoroaster fulgens, Wyv. Thoms. Depths of the Sea, (1873) p. 154, 
fig. 26; Sladen, Chall. Rep. Ast. (1889) p. 418. 
Arms five, greatly elongated, stiff, sometimes much compressed 
from side to side, with a prominent dorsal ridge formed of a series of 
projecting knobs; sometimes less compressed and the Jophial line 
less distinct. Ambulacra wide at base but tapering gradually, so 
that the quadriserial arrangement of the subconical suckers ceases 
before the tip of the armis reached. The adambulacral plates 
are hidden within the groove, and every alternate one forms a 
process set at right angles to the long axis of the arm, and pro- 
jecting into the groove; owing to the position and form of the 
plates the adambulacral spines intrude among the tubes. The 
lower part of the sides of the arms are thickly covered with 
needle-like spines, which become shorter the higher up they 
are on the sides of the arms; the plates on the dorsal surface 
and disk have each a stronger spine, and are covered with a 
thick coating of small sharp spines or spiniform tubercles. The 
mouth is deeply depressed, and the spines which surround it are 
the longest. ‘he madreporite is small and inconspicuous. 
Colour in spirit, milky white; when alive a “ brilliant yellow 
searlet ” (Wyv. Thoms.). 
Breadth of arm 
R. im at base. Height of do. 
125 12°5 13 14 
121 12°5 13 Hal 
89 10 9 9 
7 9 9 9 
59 8 ii a 
Distribution. Atlantic, from Nova Scotia to Pernambuco on the 
west, Faeroe and Hebrides on the east. 500-1350 fms. 
a. Faeroe Channel, 555 fms. ‘Triton’ Exp. (St. 11). 
6-f. Faeroe Channel, 570 fms. ‘Triton’ Exp. (St. 13). 
g. Faeroe Channel, 542 fms. * Porcupine’ Exp. (St. 47 A). 
SOLASTERID& (see p. 22). 
SOLASTER. 
Solaster, Morb, Mem. Wern. Soc. viii. (1839) p. 120; td. Brit. Stary. 
(1840) p. 109; M. Tr. Syst. Ast. (1842) p. 26; Viguier, Arch. Zool, 
expér. vil. (1878) p. 184; Dan. §& Kor. Norsk. Nordh. Exp. Aster, 
(1884) p. 51 *. 
* The evidence by which these authors rebut the distinctness of Solaster and 
Crossaster as maintained by some writers, of whom I was once one (see Ann. & 
Mag. viii. (1881) p. 140), is complete. 
