J.\PA^'ESE ASTEROIDEA. 661 



Outside the papular areas the abactinal plates are very re- 

 gularly arranged in rows parallel to the carina? of the arms 

 and also in rows oblique to them, and are marked off from one 

 another by thstinct gi'ooves. The plates regularly decrease in size 

 towards the periphery of the body. The plates immediately out- 

 side the central pentagon are only shghtly smaller than those 

 of the latter, regularly logenze- shaped and bears each about half 

 a dozen tufts of short, paxilla-hke spinelets. The number of these 

 tufts on a single plate decreases outwards and from about half 

 way out from the centre of the disk each plate bears only a 

 single tuft of dehcate spinelets. 



The adamhulacral jjZafes bear two gi'oups of tolerably long, 

 slender spines. On the furrow border there is a row of long spines 

 arranged in a curved palmate form. Each plate bears six (some- 

 times seven) of these spines, of which the middle ones are longer 

 than those towards either end ; on the actinal surface of the plate 

 there are 4-6 simuar spines, arranged roughly in a straight hne, 

 but sometimes very irregularly, and of unequal length. The latter 

 spines may be more or less incomplete in young specimens. 



The ventrolateral plates are regularly arranged in rows ex- 

 actly similar to those of the dorsal plates outside the central 

 pentagon. Each plate bears according to its size 3-10 spines 

 an^anged in a light curve, whose convexity is turned toward the 

 centre of the body. 



The mouth-plates are comparatively large, and each bears on 

 the fmTOw margin 7-10 subequal spines wliich are considerably 

 longer than the furrow spines of the adamhulacral plates, excepting 

 the last one or two at the abcentral end of the plate. On the 

 actinal face of each mouth-plate there is a gi'oup of smaller spines 



