PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 685 



claw is rather stout, slii;htly longer than the penultimate seg^iuent, and strongly curved. 

 In the small apical cii'ri the longest earlier segments are about half again as long as broad 

 and the outer are about as long as broad. 



The distal border of the radials is even with the rim of the centrodoreal. The 

 IBri are short with strongly converging lateral bordere and the distal border incised by 

 the posterior prolongation from the a.xillary. The latter is broadly pentagonal, about 

 as long as broad. The lateral edges arc about as long as those of the IBr,, with which 

 they make a broadly obtuse angle. 



The 10 arms are about 45 nmi. long. From the proximal side of the IBrj to the 

 second syzygy (9+10) measures 6.5 mm. and the width at the first syzj-gy is 0.9 mm. 

 The first brachials are very short, wedge-shaped, interiorly united in the basal third. 

 Between the first two syzygies the brachials are slightly wedge-shaped and about t\vice 

 as broad as the median length. After the second syzygy the brachials become tri- 

 angular, slightly longer than broad and soon very obliquely wedge-shaped and longer 

 than broad, the elongation increasing distally. The distal ends of the brachials are 

 not produced or modified. 



Sj^zygies are placed as usual between brachials .3+4, 9 + 10, and 14 + 15, and dis- 

 tally at intervals of two muscular articulations. 



Pi is 4.5 mm. long, exceedingly slender, with 16 segments, of which the first is 

 much broader than long, the second is broader than long, the third is nearly as long 

 as broad, the fourth is longer than broad and those following are progressively more 

 elongated with expanded and finely spinous distal ends. 



P2 resembles P,, but is slightly stouter basally and somewhat shorter, with 14 

 segments, of which the second is as long as broad and the third longer than broad. 



P3 is markedly stouter than the first two pinnules and appears to be slight!}' shorter 

 than Pj. It is the first genital pinnule. 



[Notes bt A.M.C] A second specimen in the British Museum from a neighboring 

 locality is slightly larger than the type. It has the arms broken at 50 mm. length from 

 the base; when complete they were probably about 60 mm. long. The length from 

 the proximal side of the IBr, to the second syzj'gy (brachials 9 + 10) is 8.0 mm. and the 

 width at the first syzygy is 1.4 mm. 



The hemispherical centrodorsal is almost completely covered with the cirri which 

 number about L and of which all but the apical ones seem to be arranged in irregular 

 vertical columns. The longest cirri have up to 3.3 segments and measure 14 to 16 mm. 

 in length. Their longest segments are only a third again as long as their median widths, 

 otherwise they arc similar in shape to those of the type \vitli flared ends to the longer 

 segments and a convex profde to the dorsal side of the distal segments. 



The brachials and division series all have a frill of spines along their distal edges 

 but are not notably flared or constricted in the middle. 



P, has 13 segments and measures 5.0 mm. The fourth segment is as long as broad 

 and the relative length increases so that the seventh segment is twice as long as broad 

 and the tenth is four times as long as broad. Eacli segment has a small spiny frill at 

 the distal end. The next two pinnules are the same length as Pi and with the same 

 number of segments. The onlj' difference is that the spiny frills become better de- 

 veloped. P3 is the first genital pinnule, the last being in the vicinity of Pu, which has 

 15 segments all of which are expanded at both ends to a much greater extent than are 

 the segments of the oral pinnules; its length totals 7 mm. 



