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being very small along the margin and in the distal part of the 

 arms. There is in the disk a central area of smaller paxilla} 

 aromid the anus, but it is not so well marked as in Persephonaster 

 triacanthus or many species of Astropecten ; in fact the perianal 

 paxillse are not very numerous and pass on so gradually to those 

 of ordinary size, that the area in question is not conspicuous (PL 

 II, fig. 23). The tabula are more or less cylindrical, and not 

 flattened as in many species of Astropecten. On one of the largest 

 paxilla? I counted as many as some thirty coronal spinelets, while 

 a small paxilla near the tip of the arms carries only five or six 

 of them. The bases of the tabula of adjacent paxillse are joined 

 by slender, delicate, radiating calcareous pieces ; and in the meshes 

 thus formed are found the papulae, one in each, of a conical form 

 (PI. II, fig. 32). In each arm there is a median longitudinal band 

 wliere the papulœ are totally absent, as in Astropecten^ but it is 

 very narrow and inconspicuous. 



Madreporite. — The madreporite (PI. II, fig. 33) is rather con- 

 spicuous and is situated about midway between the centre of the 

 disk and the margin. It is nearly round and in my specimens is 

 2.5 and 3 mm. in diameter respectively ; its surface is covered with 

 granules. The furrows are mostly radiating. 



Terminal plate. — The terminal plates are small and about twice 

 as long as broad. 



Localitij. — Both of my specimens are from the neighbourhood 

 of Misaki. The only record I have about the habitat of this 

 species is that one of the specimens was fished from a depth of 

 about 550 m. 



Two alcoholic specimens in S. C. 



