Indian Deep-sea 'Dredging. 435 



Iiitcrbracliial arcs extremely wide, eacli with three large 

 ))a]Mllar cribriform organs. 



Abactiiial area covered with a toughish membrane, beset 

 with numerous paxilhT. of two kinds. Those in the middle of 

 the radial areas of the disk are large and are surmounted by 

 ten to fifteen or more granular spinelets ; they extend in a 

 ta|)cring band from near the base of the epiproctal tube to 

 near the base of the ray, and the five tapering bands show as 

 a conspicuous rosette on the disk. The paxilUe elsewhere 

 are small and are surmounted by but three or four spinelets. 

 There are apparently no papulaj. 



]\Iarginal plates highly granular, unarmed, forming a per- 

 pendicular wall. Supero-marginals 6, excluding the ter- 

 minal ; they hardly meet in the middle line along the ray ; 

 the last ])late, like the last infero-marginal, is a very small 

 inconspicuous triangular scale, wedged in almost beneath the 

 large upturned terminal plate ; this last forms a tumid boss 

 armed with four large acute spines. The infero-marginals 

 correspond in immber and arrangement with the supero- 

 marginals, but are rather smaller. 



Fi- 11. 



Hyphalaster tara, natural size. 



Adambulacral plates large, each with a furrow-series of five 

 or six compressed lanceolate spinelets arranged in a fan-like 

 comb. Mouth-plates large, tumid aetinally, the suture widely 

 open ; the margin of each bears seven compressed lanceolate 

 spinelets, of which the adoral one is much enlarged, 



Aetinal interradial areas extensive, with broad scale-like 

 imbricating plates arranged in about nine columns pai'allel to 

 the radial axis ; some of the plates have small deciduous 

 spikelets. 



Ambulacra! furrows broad, 



Madreporiform body marginal. 



Colour in the fresh state white, tube-feet pink. 



Station 110, 1997 fathoms ; Station 117, 1748 fatlioms. 



