MONOGRAPH OF THE EXISTING CKINOIDS. 



547 



The radials are just in contact laterally. 



The radianal, though still large and conspicuous, has been shoved upward 

 and outward through the growth of the lower left-hand corner of the right pos- 

 terior radial outward along the distal right side of the posterior basal nearly 

 to the apex. 



The IBr,, IBr 2 , first brachials, and rudiments of the second brachials are 

 present. 



Delicate, irregular, cribiform films along the sides of the IBr, and IBr 2 and 

 of the first brachials, increasing in size to those bordering the last named, are 

 the beginnings of covering plates. 



There is a pair of sacculi at the base of the IBr,, another at the base of the 

 first brachials, and a third at the base of the second brachials. 



No. 34 (fig. 924, p. 545) : Dredged on November 9, 1902, in 385 meters. 



Total length (distal portion of column missing), about 5 mm.; length of 

 crown, about 0.6 mm. 



The basals are only very slightly convex and collectively form a very broad 

 cup which is rather more than twice as broad distally as high. 



The radials, which are about as long as the basals, are broadly in contact 

 laterally. The distal border of the radial circlet shows deep, regularly rounded 

 concavities between the bases of the IBr,. 



The radianal, apparently much reduced in size, lies over the suture between 

 the two posterior basals; the left side of the right posterior basal has become 

 almost symmetrical with the right. 



The IBr,, which are about as long as the radials, are present, but beyond 

 their distal border the arms have been lost. 



The orals, the tips of which extend for some distance beyond the distal ends 

 of the IBr,, are of the usual shape. 



No. 35 (fig. 925, p. 545) : Dredged on September 1, 1902, in 385 meters. 



A specimen resembling the preceding in all essentials. 



No. 36 (fig. 926, p. 545) : Dredged on January 12, 1903, at a depth of 380 meters. 



Total length, about 10 mm. ; length of crown, about 2.6 mm. 



The stem is composed of 32 columnals and a terminal stem plate. The 

 proximal columnal is elongated, about twice as broad as long, but as yet shows 

 no evidence of broadening. 



The terminal stem plate, attached to the stem of a hydroid colony, is very 

 deeply stellate, so much so that it bears a striking resemblance to a specimen 

 of HenricM sanguinolenta. 



The radials are in contact laterally for a distance equal to about half that 

 of the apposed borders of the basals. The posterior radials have just come into 

 contact beneath the radianal. 



There are eight or nine brachials present. 



No. 37: Dredged on December 31, 1902, in 385 meters. 



There are 26 columnals and a terminal stem plate, which, as in the preceding, 

 is produced into five long, slender, fingerlike processes. 



