ni."ihi:\ 01 miktii PACIFIC kND ADJACENT u vtkks hsiikk M 



The papillae could be determined bj softenings raj of the cotype Abactinally 

 hi the base and middle "r ray there are \'< to 25 in i ln> larger skeletal meshes, and 10 

 in the small; in tin 1 intermarginal meshes, 6 to i": in areas between the inferomarginal 

 and first aotinal plates, live or Bix; between the two series of actinal plates, t Itr- 

 four: jiiiil adjaoenl i" the adambulacral plates, proximallj two o? threi 



Two kinds of pedicellariae, Btraighl and crossed, are present. The straight 

 pedicellariae are numerous, small, and practically nil of one form, orate or broadly 

 lanceolate, obtuse, as seen in profile Thej are thickly scattered nil over tln> abactinal 

 Burface, intennarginally, actinally, and, with small orosBed pedicellariae, form Imlf 

 wreaths <>n the inferomarginal, actinal, and Bubambulacral spines, and conspicuous 

 clusters on the furrow spines (of alternate plates). A few quite small ones are found 

 on tln v furrow face of the adambulacral plates, and clusters are present on nil of the 

 mouth spines. The largest are found in the intermarginal channel where they are 

 commonly 0.5 to 65 mm. long al the base of ray. Those on the actinal plates and 

 spine- are a little smaller, w bile the numerous adambulacra] one- are <).:< to 0.375 mm. 

 long. The abactinal Btraighl pedicellariae are 0.3 to 0.5 nun. long as a rule. As 

 shown by the figures, these pedicellariae are of a simple generalised form with rather 

 irregular minutely denticulate edges to the jaws. No trace of specialised unguiculate 

 pedicellariae could be discovered 



The crossed pedicellariae are quite small, mostly between 0.2 and 0.3 nun. in 

 length and form clusters or wreaths around the base of the abaotinsl and superomargi- 

 aal Bpines, and are scattered also on the Burface of plates at a distance from son 

 Mingled with the Btraighl pedicellariae, they form half-wreaths or bouquets on the 

 outer side of the inferomarginal and actinal Bpines, and a fen are found in the adam- 

 bulacral clusters, where the Btraighl pedicellariae greatly predominate. The exact 

 form of these pedioellaiiae is beet appreciated from figures a> there i- some variation, 

 impare with pedicellariae of /.. polaris, I.. poUa '■' and format 



The madreporic body is conspicuous, 5.5 mm. in diameter, very alightlj 

 with rather fine branched, radiating grooves or Btriae. The center of the madreporite 

 is about n i r from the center of >lisk. 



domical notes. —The cotype was softened for cleaning and one ray removed. 

 The gonads although shrunken appear to have been voluminous. Thej are attached 

 to the interbrachial septum about midway between the dorsal and ventral surl 

 of the body, considerably below the level of the upturned line ofsuperomarginal pi 

 The gonoduot appears to turn downward l>ut whether it opens mtermarginally or 

 actinally can not l>e determined. 



The dorsal skeleton, that is. nil the plates above the Buperomarginals, is 

 irregularly reticulate. The primary Bpine-bearing plates are usually irregularly 

 three or four lobed, These are rather outnumbered l>y elongate or faintly lobate 

 plates of diverse Bizes which might roughly be classed as connectives. A portion of 

 the abactinal skeleton fmm the radial region of the cotype is figured on l'ln: 

 Figure 2 This i- from the coelomic side. Just above the supermarginal p 

 (pi :> i fig, i* i- a low of elongate transversely oriented connectives, between which 

 nn- large papular an erally well supplied with Btraight pedicellariae. The 



Buperomarginal, inferomarginal, and l>oth series of aotinal plates are regularly four 



I and are imbricated in transverse as well as longitudinal series Internally, 



