236 s. GOTO : 



above ; no sjjecialised spines on eitlier series ; adambiüacral plates with a 

 fiuTow series of tlu'ee or foiu' spinelets, and on actiual smface two or tln-ee 

 longitudinal series (often iiTegnlar) of three to five spinelets each, with 

 sometimes two or tlnee small spinelets out of line ; abactinal paxillae veiy 

 compactly placed, longest on inteiTadial area of disk and on either side of 

 median radial area along ray ; actinal interradial areas fairly large, the 

 interaaediate plates extending far along the raj*. 



"Description. — The paxiUie are closely j)laced and the difference in size 

 between those of the midi-adial region of ray and centre of disk, and those 

 along side of paxillar area (particularly in the iuterradial region) is very 

 marked — mncli more so than in Lepty chaster jxicißcm. A large paxilla of the 

 inteiTadial region of disk presents a shghtiy convex crown of small terete, 

 compactly placed spinelets, varying in number according to the size of the 

 paxilla, a fairly large one having twenty to twenty-five peripheral and about 

 the same number of central spinelets, a trifle shorter than column of paxilla. 

 Papula} absent from centre of disk and along median radial area ; five or six 

 (sometimes fom*) about each plate irregulaiiy, on interradial regions and 

 along border of paxillar area of ray. Abactinal plates slightly and irregular- 

 ly lobed on papular areas, much less obviously so tlian in j3rtci/?c«.s. 



" Superomarginal plates, forty-one in number from interradial hne to 

 extremity of ray, are much smaller tlian in either of the two other species'^ 

 described below, and liave the form of large paxilliie, being not conspicuously 

 wider in interbrachial angle than midway along ray. They are irregular or 

 .subcircular in outHne, rather straight sided adjacent to inferior series, have 

 the appearance of being obhquely oriented and do not correspond exactly to 

 inferomarginals. Opposite the first ten superomarginals are seventeen abac- 

 tinal paxillœ (or irregular transverse series). The superomarginals are 

 confined to the abactinal smface and their spinelets are heavier and slightly 

 more numerous than on the other paxillœ. Terminal plate wider than long, 

 with a roimded end ; notched adjacent to paxillœ. * 



" Inferomarginals much shorter than wide, obliquely oriented (about 45^) 

 to ti-ansverse axis of ray, and occupying entire side wall of ray. Each plate 



1) I'avificus and (inomidus. 



