Indian Deep-sea Asteroidea. 89 



in tlie iiitcnadial areas, Hcxible ; rays very short and Itroail, 

 flat, pointed, rigid, upturned at tlie tip. 



Abactinal surface covered with uniforinly small rouml 

 tabuhir phites, which are distinctly isolated t'roni one another 

 and are fringed with a single row of Hat squamous membrane- 

 clad granules Hush with the general surface, but are otherwise 

 naked, excei)t that some of the plates (jjerhaps one fourth) 

 bear a very excentric or quite margiiuil broadly bilobcd pedi- 

 cellaria. Papulte long, crowded everywhere, except in a 

 narrow band down the middle of each interradial area, where 

 the plates are in close apposition. 



Marginal plates 17 in each series from mid-intcrbraehium 

 to tij) of ray, (juadrangular, fringed with squamous granules 

 like the abactinal plates, and occasionally bearing a deciduous 

 bilobed pedicellaria ; the supero-marginals with a small 

 central patch of deciduous granules, the infero-marginals with 

 a much larger similar patch ; at the very tip of the rays these 

 patches of granules are placed on distinct elevations. 



Adambulacral plates with a furrow-scries of 6 or 7 coarse 

 prism- shaped spinelets, and actinally with (i.) a longitudinal 

 series of three or four large coarse distant granules, one or two 

 of which in a series are often replaced by a bivalve pedi- 

 cellaria ; and (ii.) numerous distant conical granules, arranged 

 in two irregular rows, but sometimes only in one. J\iouth- 

 plates large, with the furrow spinelets chisel-shaped, the most 

 central (adoral) one being enlarged. 



Actinal interradial areas very large, continued to the tip 

 of the ray ; the intermediate plates are rather closely covered 

 ■with small rounded granules which are more or less decidu- 

 ous; many of those nearest the actinostome carry one or two 

 rather broadly bilobed pedicellaricC. 



iVnus excentric. ^ladreporiform plate of moderate size, 

 placed a third of the way from the centre to the margin, with 

 fine radial striations. 



Colour in life brilliant orange. 



Bay of Bengal, off the Kistna Delta, 678 fathoms, brown 

 mud. 



22. Pentagonasier arcuatuSj Sladen. 



rimtiKjonasler arcuaius, Sladen, ' Challenger ' Asteroidea, p. 277, pi. Hi. 

 figs. 1 and 2, pi. xviii. tigs, 5 and 0. 



1 am not quite certain about this determination, although 

 our species conforms exactly to Mr. Sladen's description, and 

 although the habitat supports it — the ' Ciiallenger ' specimen 

 being dredged in the green mud of the Japanese Sea at 



Ann. dD Mag. N. Hist. ^ier. G. Vol. xi, 7 



