402 A. EF. Verrill—Marine Fauna of the Outer Banks, ete. 
scattered between the dorsal spines and clustered around their 
bases. Radius of disk, 11; of arms, 75"; larger ren 
250™™ in diameter, were ‘secured, but most of them had dismem 
bered themselves, "before reaching the surface. 
Odontaster Verrill, gen. nov. 
Form and appearance like Archaster ; two rows of marginal 
plates ; dorsal surface with paxille ; ventral plates polygonal, 
spinulose. ach jaw bears a large, strong, sharp, erect or 
everted tooth, outside of the marginal spinules. 
repr ead hispidus Vv. , 8p. nov. 
tooth of jaws with saci smooth tip, “atraaite or “recurved, 
longer and much larger than adjacent spines. Color ale 
salmon, or yellowish, when —e Radius of disk, 15; of 
arms, 49mm, 
Archaster Americanus Verrill, sp. nov. 
Arms five, rarely six, tie regularly tapered, moderately 
broad, rather flat. Radius of disk to that o arms, commonly, 
: 5. Color in life, pale yellow, orange-yellow, or salmon. 
Dorsal area covered with slender r paxille, not crowded, each 
pearing. a stellate group of eight to ten she slender, long spin- 
ith a central one of the same siz Upper marginal 
aS rather large, elongated vertically, densely covered with 
small spinules, which radiate around the margin; sometimes a 
few plates, in the angles between the arms, bear, each, a single 
spine, at the upper end. Lower plates large, broad, ‘reaching 
nearly to the ambulacral groove, covered with : slender, sharp 
spinules, the middle row longest; two or three of the outermost 
of these are much longer and larger than the rest, and more 
or less flattened. Ventral plates very few, spinulose. Adam- 
bulacral plates, each with an inner group of three or four 
slender spines, in a row, and an irregular outer group of three 
or four larger ones; jaw-spines numerous, blunt. Largest 
specimens have the larger radius 74; lesser 12™". 
