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almost that of a compact comb. Tlie second series, "wliicli is placed on the 

 actiiial surface of the plate, consists of five quadrangular prismatic spinelets, 

 wliicli taper slightly, and are shorter but more robust than the furrow series. 

 The adorai spinelet of this series is iisually placed rather further back on 

 the plate than the others, a circumstance which causes tliis series to liave 

 the appearance of a slightly oblique position. Tlie third series is close to 

 the external margin of the plate, and consists of fom" or five low, equal, 

 granuliform spinelets, or spiniform graniües, much shorter than the median 

 series just described. The outer spinelet at each end of the series is often 

 accompanied by another placed close beliind, and this is sometimes modified 

 into a pedicellaria. Sometimes the whole line may be doubled on the outer 

 part of the ray. The tlu-ee distinct series of spinelets above described are 

 comparatively widely spaced apart. 



" The mouth-plates are small and inconspicuous. Their armature con- 

 sists of a marginal series on each plate of ten to thirteen powerful repre- 

 sentatives of the marginal spinelets on the adambulacral plates, which 

 increase in size as they approach the mouth. On the actinal sm-face of the 

 j)late is a lineal series of about five short, robust, prismatic secondary 

 spinelets, and on the outer part of the plate are a few prismatic granules. 



" The actinal interradial areas are large, and extend far along the ray. 

 The intermediate plates have, in consequence of their mode of granulation, 

 a very paxilliform appearance, their armature consisting of a marginal series 

 of slightly elongate subprismatic gi'anules surrounding several larger hemi- 

 spherical granules, all of which are well spaced. 



" The madreporiform body is situated near the centre, its inner margin 

 being less than one-fouiih of the distance from the centre to the margin. 

 It is rather large and subcircular in outline, and its sm-face is marked with 

 fine striations, which are much convoluted in the central region. 



" Colour in alcohol, a light shade of umber brown. 



" Loccdity. — Station 232. South of Yeddo, Japan. May 12, 1875. Lat. 

 35° 11' 0" N., long. 139° 28' 0" E. Depth 345 fathoms. Green mud. Bottom 

 temperature 41°. 1 Fahr. ; surface temperature 64°. 2 Fahr. 



