JAPANESE ASTEEOIDEA. 227 



usiTally one or two larger spinelets, tliickly invested with membrane, 

 especially noticeable on the inner part of the ray, bnt of which no trace 

 remains in the adult — that is to say, their prominence and juvenile robust- 

 ness are altogether lost. 



" Locality. — Station 232. Off the coast of Japan, south of Yeddo. 

 May 12, 1875. Lat. 35° 11' 0" N., long. 139*^ 28' 0" E. Depth 345 fathoms. 

 Green mud. Bottom temperatm'e 41°. 1 Falu-. ; sm-face temperature 64°. 2 

 Falu\ 



" Remaries. ■ — Astropeden hrevispimis is distinguished from the other 

 species in tliis section of the genus Astropeden by the single lateral sx:)ine, 

 by the character of the adambulacral armatm*e, and by the character of the 

 paxillœ. It differs from Asfropeden antillensis and Astropeden hrasiliensis 

 in each of these jDarticulars. It is at once distinguished from Astropeden 

 aurantiacus, which has a single lateral spine, by the general facies, and by 

 the character of the adambulacral armature ; and from Astropeden erinaceus 

 and Astropeden dnplicatiis by the single lateral spine and the different 

 character of the spinulation of the infero-marginal plates." 



As mentioned under P. triacantJiiis this species may prove to be iden- 

 tical with it. 



Lepty chaster arcticiis (Saes). 



Tliis species was first described by M. Saes under the name of 

 Astropeden ardicns [ '50, p. 161] and later figm-ed by him [ '56, p. 61, pi. IX, 

 fig. 16-18], It is also mentioned by M'Andkew and B.uîrett [ '57, p. 45] and 

 again by the same authors [ '57, p. 45] as well as by Baekett [ '57, j). 46, pi. 

 IV, fig. 3] imder the name of Astropeden JätJceni. Saes mentions it again 

 under the original name [ '61, p. 32]. All these papers are not accessible 

 to me, and the above is given on the authority of Ludwig [ : 00, p. 452]. 



DujAEDiN and Hupe describe this species under two names, Astropeden 

 ardicns and Astropecten liltJceni [ '62, p. 428] : 



" Asti'opecten arctique. Astropeden ardicns. — Saes [References to Saes 

 and Baeeett]. 



