A MONOGRAPH OF THE EXISTING CRINOIDS 31 



height equaUng half the width of the penultimate segment. The terminal claw is 

 thick and curved and is a little longer than the penultimate segment. The IBr, are 

 four tunes as broad as long. The IBrj (axillaries) are pentagonal, twice as broad as 

 long, and form a small but distinct synarthrial tubercle with the IBri. The IIBr, are 

 interiorly united. The IIBrj (axillaries) are sunilar to the IBrj. IIIBr series are 

 present in at least five cases. The ossicles of the division series have ventrolateral 

 processes. The 21 + arms are 110+ mm. long (detached arms are 140 mm. long) and 

 are much broken. The chstal ends of the brachials are a little thickened with a 

 sUghtly spiny edge, these produced ends breaking the even profile of the arms. The 

 second syzygy is at about the twentieth brachial, and the distal intersyzygial interval 

 is about 10 muscular articulations. P, is 11 mm. long with about 30 segments; it is 

 slender and smooth basally, the last 10 segments widened and spiny distally, thus 

 forming spiny crowns wider than the base of the segment following. P2 is 14.5 mm. 

 long with 23 segments, very stout and hornlike; from the eighth segment onward 

 there is a tuft of spines on the distal outer side of each segment, this tuft broadening to 

 a semicircle on the outer segments. P3 is 6.5 mm. long with 16 segments and, like 

 the pinnules follomng, is almost smooth with traces of distal crowns on the proximal 

 segments. The second-fourth segments of the proximal pinnules have a prominent 

 crest on the outer side which is interrupted at the articulations. The distal pinnules 

 are 11 mm. long with about 28 segments. The disk, which is detached, is very much 

 incised- the smaUest diameter is 5.5 mm., the largest 11.5 mm. The color is dark 

 purplish the distal portion of the arms brownish dorsaUy with large purple blotches. 

 Another specimen from Jaluit has the dorsal pole of the centrodorsal concave, 

 and the cirri arranged m 2-3 closely crowded rows. The cu-ri are XLVII, 38-42 from 

 25 to 28 mm. long. IIIBr series are present m at least 10 cases. The ventrolateral 

 processes on the am bases are prominent. There are 29 + arms, aU broken. 



In a third specimen from Jaluit the cirri are XXII, 26-32, from 14 to 17 mm. long. 

 The double tubercles on the middle segments are closer together and more distmct 

 than in the two preceding specunens. The IIBr, are interiorly united basally. The 

 ventrolateral processes on the arm bases have a small cannation. The 27 arms are 

 80 mm long, slender and smooth. P, is 5.5 mm. long with 18 segments. P2 is 7 mm. 

 long with 16 segments. P3 is about 5 mm. long with 15 segments. There is no 

 carmation of the bases of the proximal pumules. 



In the specimen form Fiji, accordmg to Gislen, the centrodorsal is 6 mm. m ^ame- 

 ter with the excavated dorsal pole 2 mm. in diameter. The curi are about XXX, 

 39-45 about 25 mm. long, with a transverse crest that develops mto two very mdis- 

 tinct dorsal tubercles on about the thktieth segment. The two tubercles are closely 

 set and coalesce mto a smgle smaU, well-circumscribed dorsal tubercle on the outer 

 segments The arms are very much broken, but were more than 20 m the complete 

 snecimen; detached arms are 100-120 mm. long. Ventrolateral cannation is present 

 on the proximal ossicles. P. is 7-8 mm. long with 15-18 segments. P, is 9-10.5 mm. 

 long with 15-18 segments. P3 is 4-5.5 mm. long with 14 segments. There is no 

 cannation of the basal portion of the proximal phinules „ , ^ . ^, . , .^ ., 



Professor Gislen said that the large specmiens (that is, aU but the third from the 

 Marshall Islands) differ from all the other species of Cenometra except C abbotti m 

 havm- 40-45 cirrus segments. However, he said, in the species mentioned there are 



