140 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



free, in having the actinal intermediate plates reduced to rudiments 

 on the ray, and in having a decidedly Astropectenlike type of adam- 

 bulacral armature. When the genus was instituted I thought the 

 small suj^eromarginals were of generic importance, but such has 

 proved not to be the case. The curious lateral combs of inferomar- 

 ginal spines and the extremely tumid plates are characteristic of the 

 two species, and are an exaggeration of what occurs in some species 

 of Persephonaster. If T. evorus approaches Persephonaster in the 

 superomarginals it departs even more than cmspedotus in its 

 Astropectenlike adambulacrals, reduced paxiliae, and rudimentary 

 actinal intermediate plates. 



Genus ANTHOSTICTS Fisher. 



Anthosticte Fishee, 1911c, p. 417. Type, A. aulophora Fisher. 

 Diagnosis. — Near Tethyaster but distinguished by the presence of 

 very deep marginal fascioles, the absence of a regular midradial 

 series of enlarged paxiliae, the extension of the gonads to end of ray, 

 and the character of the paxiliae, which are tall and slender. Supero- 

 marginal plates w^ithout specialized spines; inferomarginals with a 

 single transverse row of small, flattened, sharp, appressed spines; 

 fascioles between marginals very deep, lined with small spinelets and 

 in continuation of the actinal fasciolar channels. Abactinal plates 

 stellate, the shaft of paxilla tall, slender, and crowned by a floriform 

 group of slender spinelets; papulae all over abactinal surface. Acti- 

 nal intermediate plates extending nearly to end of ra}^, and traversed, 

 between marginals and adambulacrals, by deep channels; no en- 

 larged actinal intermediate spines; an incipient series of odd inter- 

 radial actinal plates ; adambulacral plates with a very prominent fur- 

 row angle and an astropectinoid armature; no enlarged sul)ambu- 

 lacral on distal portion of ray; fascioles between the adambulacral 

 plates shallow and not lined with spinelets, as in Sideriaster. Tufts 

 of gonads extending to end of ray. Madreporic body not concealed. 

 Superambulacral plates large. Tube feet pointed, with simple rod- 

 like deposits at tip. Small spiniform abactinal pedicellariue. 



ANTHOSTICTE AULOPHORA Fisher. 



Plate 17, fig. 1; plate 18, fig. 3; plate 19, fig. 2; plate 38, fig. 3; plate 39. 



figs. 1, Icu-d. 



Anthosticte aulophora Fishek, 1911c, p. 417. 

 Diagnosis. — Eays 5. K=:162 mm., r=34 mm., K=4.T6+r ; breadth 

 of ray at base, 40 mm., at tenth superomarginal, 29 mm. Disk mod- 

 erate, rays long, rather narrow beyond interbrachium, tapering very 

 gradually to a bluntly pointed extremity; sides of ray and disk 

 evenly rounded; abactinal surface slightly convex; paxiliae fairly 



