wn-.i;i.n.i-: \ 01 NORTH PACDfll \M> ADJACENT WATKBE PISH] s ~ 



Ahactinal -pirn - well Bpaoed, prominent, cylindrical at 1 1 * • - 

 with a slightly swollen, longitudinally striated conical or acorn-shaped round tipped 



ubacute distal half. The oarinals are usually distinguishable by being a little 



r together rather than by superior size; bul often they are nol distinguishable 

 from the other spines The relative thickness and form ■ > f tin- spines is decidedly 

 variable. Sometimes thej are fairly -hurt ami robust, the acorn-ehaped portion 

 occupying almost the entire length; or the spine is distinctly stytiform The 

 type from Captains Bay lias coarsel] i I subacute, unusually widely Bpaoed 



Bpinee which in the dried condition appear slender-conioal The plates are distinctly 

 convex, which adds to the apparent length '>f the -pine- of this species The dorso- 

 lateral spines are nol in regular longiseries, aol in quincunx, but for short ■ 1 i —- 1 . = 

 Bometimee stand in longiseries or oblique series. There are the equivalent of about 

 three to five longiseries in grown specimi 



Superomarginals cylindrical, tapered, bluntly pointed, less often obtuse, some- 

 times asymmetrical or even a trifle bent at the tip. which i- also usually a trille 

 swollen. The Bpines stand regularly one to a plate, are a little longer than the 

 ahactinals, and the series curves upward to the abactinal surface at the interbrachial 

 angle, [ntermarginal channel narrow, definite, very well marked. 



Inferomarginal spun- still longer than the superomarginals (3 to .". in 



medium-sized to large specimens), cylindrical at base, tapering on outer half, and 

 finally at the tip sometimes decidedly compressed, blunt or Bubtruncate Most of 

 the terete ~ pi n< - are bluntly pointed. 



A e tinal spines in one to three series according to size), similar to the inferomar- 

 trinals with which they also form transverse combs, the narrow interval- between the 



3 being Bubequal. In average sized specimens, the outer row of actinal p 

 extends to within a short distance of the ray-tip while the second series reaches up- 

 ward of two-thirds the length of raj R 124 mm.)- A specimen from station 1777. 

 with K 114 nun. has only a single Beries of actinal -pine-., which is exceptional. In 



the very large type from ( 'aptain- Hay there are three seric- of actinals to the middle 

 of ray, and two nearly to the end I'l. 26, ". : ","' 



The abactinal skeleton is irregular, tie- plates overlapping broadly l>y their 

 three or four usually unequal asymmetrical lobes. The marginals and actinals, on 

 the contrary, build very regular Beries and imbricate longitudinally and tran-\' 

 very strongly. The entire width occupied by the actinal and marginal plates is much 

 less (about two-thirds) than the breadth <>f tic dorsolateral area The marginals 

 and actinals are proximally asymmetrically four lobed, ami beyond the proximal 

 fourth of ray become longer than broad, and appear superficially more often three 



than four lobed The central portion of the plates i-, Btrongly convex 



Papular area- relatively small (those just above superomarginals 1- three 



to -i\, or more papulae to an area abai 'finally where they arc not COnspiCUO 



to the thick mate of crossed pedicellariae Burrounding spines There 1- an intermar- 



ginal Beries of area-, and one to four actinal -cries, proximally. to one to three distally 



according to -i/e of specimen. 



Adainbiibicral plate- i •otiipre— i-d, about 33 U) 10 inforomaririnals at middle of 



raj The armature i- ideally alternate!] tnonacanthid and diplacanthid, but the 

 aritj i- disturbed at base of ray where the plates of adoral carina and a few 



