Indinn Dcpp-ficn Dredjiivj. 431 



Abactiiial surface of disk and rajs with close-set spinoso 

 paxilia^, which become small and crowded towards the sub- 

 central anal aperture ; those of the rays are somewhat 

 obscurely arranged in transverse series. 



The whole abactinal surface is perforated with close-set 

 papulffi. The supero-niarginal plates are 31 in number and 

 are directly su])erposed on the infero-marginals, plate to 

 plate ; each })late is coarsely granular in the middle and 

 covered near the margin with capillary spinules, and bears 

 two rigid s])ines, one at the abactinal, the other near the 

 actinal end, the former being the smaller and often bifid. Tiie 

 infero-marginals correspond, plate to plate, with the supero- 

 marginals ; they are uniformly covered with papillitbrm 

 granules, which are largest in the middle of the plat^*, and 

 each bears near its abactinal end a stout rigid spine, beneath 

 ■whicii is an obliquely vertical row of three or four slender 

 movable spines. 



Adambulacral plates with a slightly convex furrow-margin, 

 armed with a comb of six or seven longish compressed spines ; 

 actinally there are two longitudinal series of small, inHated, 

 longitudinally-grooved (barleycorn-shaped) spines, four in 

 each series. i\Jouth-plates small, tumid, with close suture; 

 each plate with a furrow-series of about seven spines, the 

 most adcentral of which is of enormous relative size, and with 

 two longitudinal series of close-set papilliform spiuelets on 

 the actinal surface. 



Actinal interradial areas large, the intermediate plates 

 extending halfway along the rays ; each plate closely covered 

 with " barleycorn " spines. 



Madreporiform body small and inconspicuous, situated 

 about two diameters from the margin of the disk. 



Ambulacral groove extremely broad and open ; tube-feet 

 large, conical. 



Colour in the fresh state olive-yellow, marginal plates 

 pink, tube-feet red. 



Station 109, 738 fathoms. 



6. Persephonaster rhodopeplus, sp. n. 

 Rays 5. R = 3-5 r. 



Eays rather short, rigid. 



Abactinal surface of disk and rays covered with very close- 

 set tabulate paxillfe surmounted by numerous flat-topped 

 granules ; the paxill^e are very small and crowded towards 

 the subcentral anal aperture ; those of the rays are arranged 



30* 



