74 ASTEROIDEA, 
longer than those of the outer but are not so stout. The inter- 
mediate plates uniformly but coarsely granulated, the granulation 
much coarser than that on the marginal plates, from which it 
becomes more or less lost. The plates of the dorsal surface regu- 
larly hexagonal or sometimes irregular, covered by broad flat 
granules. Madreporite inconspicuous. 
Colour, dried, white. 
R. Re Greatest depth. 
19 13 6 
15:5 ey 4:5 
Distribution. Both sides of North Atlantic ; to Arctic Ocean and 
White Sea on the east. 20-750 fms. 
a, b, Faeroe Channel, 440 fms. ‘Porcupine’ Exp. (St. 51). 
2. Pentagonaster greeni. 
Astrogonium greeni, Bell, Ann. § Mag. iv. (1889) p. 433, pl. xix. 
fig. 4. 
Ra=27, 72a. 
The curve between the arms is well rounded ; there are seven or 
eae 
Bore 
Peep 
Pentagonaster greent. 
eight superomarginal and seven to nine inferomarginal plates; those 
of the upper and lower series do not correspond regularly ; the 
