Indian Deep-sea Dredging, 437 



five to nine. The plates are covered witli membrane, widely 

 placed onwliicli are beautiful forceps-like pedicel! aria). Near 

 the middle of each plate is a long, stout, acute, movable spine, 

 the base of which is buried in a large, fleshy, papillose 

 eminence. 



Marginal plates distinct, clothed and armed like the abac- 

 tinals, and separated by similar groups of papulse. 



Actinal aspect of the rays almost completely occupied by 

 the ambulacral groove, a single series of very narrow distant 

 plates intervening between the adambulacrals and the infero- 

 marginals. The intervals between these intermediate plates 

 are filled each with a large papula, round which is a ring of 

 forceps-like pediceliariae. 



Adambulacral plates very small, each armed with two 

 spines which form a double palisade along the margin of the 

 ■wide ambulacral groove. Inside this, i. e. within the ambu- 

 lacral groove, is a more or less regular row of forceps-like 

 pedicellarife. 



The mouth-plates are recognizable by their longer furrow- 

 spines. In the angle of each extremely narrow intcrbrachial 

 arc, behind the mouth-plate, is a crowd of pedicellariaj. 



Madreporiform body rather large, radially striated. 



Anal aperture indistinct. 



Tube-feet quadriserial, ending in a sucker. 



Colour in the fresh state deep orange-yellow, with large 

 chestnut-brown blotches. 



One specimen from Station 115, 188 to 220 fathoms. 



Family Pterasteridse. 



Maesipaster, Sladen. 



17. Marsipaster Mrsutus^ Sladen. 



Marsipaster hirsutus, Sladen, ' Challeuger ' Asteroidea, p. 487, pi. Ixxviii. 

 figs. 3 and 4, pi. Ixxix. figs. 4-6. 



One small specimen with ova in the nidamental cavity. 

 Colour in the fresh state transparent hyaline grey. 

 Station 110, 1997 fathoms. 



Hymenastek, Wyvilie-Thomson. 

 18. IJymenaster nobih's, Wyvilie-Thomson. 



Hymenaster nohilis, Wyv.-Thoms. Journ. Linn. Soc, Zool. vol. xiii. 

 p. 73, fig. 11 ; Sladen, 'Challenger' Asteroidea, p. 495, pi. Ixxxvii. 

 tigs. 1-3, 



