Iiiilutn Deep-ftea Astcroidea. 95 



The marginal plates are large atul rectangular and are 

 unifoinily covered with small granules, without any other 

 armature ; many of them bear an entrenched pedieellaria, 

 found only on denudation ; they number about twenty-two in 

 each scries, which correspond plate to plate ; tiie supero- 

 margir.als do not meet across the ray even at its very tip. 



Tiie adambulacral plates have a pectinate furrow-series of 

 seven to eight long tine spinelets of nearly equal size, the 

 proximal (adoral) one of the series alone being diminutive, 

 and actinally a row of from three to five pai)illary spinelets, 

 and outside these a row of four or five granules. Mouth- 

 plates small, the conjoint pair nearly cireidar in outline, the 

 armature hardly differing from the adambulacral tyj)e except 

 that the granules are more numerous. 



Actinal interradial areas large, each area carrying about 

 sixty irregularly quadrangular plates arranged in chevron 

 series; all of these plates are granular like the marginal 

 plates, and many of those nearest the ambulacrum have an 

 entrenched ])edicellaria. 



Madreporiform plate small but conspicuous, placed very 

 much nearer to the centre than to the margin of the disk. 



'l"he papulae are found only in the rosette of the abactinal 

 surface, where they stand with great regularity at the angles 

 of the hexagonal plates. 



Andaman Sea, liiO to 250 fathoms. 



This species much resembles Nymphaster hipunctus^ 

 Sladen. 



Jn young specimens U = about 2*2 r, the interbrachial arcs 

 are not so wide as they are in the adult, the apical plates arc 

 c<)nspicuously large, and the marginal plates luunber eight or 

 nine in each series. 



28. JSympliasler protentuSj Sladen. 



Ni/mphasier 2}rotent lis, Sladen, 'Challenger' Asteroidea, p. 303, pi. 1. 

 ligs. 3 and 4, pi. liii. figs. 9 and 10. 



Andaman Sea, 220 to 250 fathoms. 



29. Nyniphaster basUicus, Sladen. 



Nymphaster hasilicus, Sladen, * Challenger ' Asteroidea, p. 308, pi. Ivii. 

 tigs. 8 and 9. 



Two fine specimens, one from the Laccadive Sea, 

 1370 fathoms, coral-mud, the other from the Gulf of Manaar, 

 597 fathoms, green mud. 



This species, as Mr. Sladen observes, appears to be very 

 near Duri<jona (ernalis, E. Pcrrier. 



