Clark — N'eiv Recent Crinoids from the Indian Ocean. 83 



cirrus socket; the colmniis of each area are closely crowded against, and 

 tend to alternate witii, the columns in adjacent areas. 



Cirri xi,, 2.5-28, about 40 mm. long; tirst joint very short, second and 

 third equal in size, aliout twice as broad as long, fourth slightly longer, 

 fifth as long as broad ; sixth, seventh and eighth joints tlie longest, sliglitly 

 longer than l)road to about one-third again as long as broad, tlie following 

 very gradually decreasing in length so that those in the distal half are 

 about as long as broad, or, in some cases, slightly broader than long; 

 third joint from the end slightly longer than broad; antepenultimate 

 about one-third longer than l)road; penultimate, which is somewhat less 

 in diameter than the preceding, half again as long as broad ; distal dorsal 

 edge of the distal joints showing an inclination to develop low blunt 

 tubercles; opposing spine represented by a small blunt tubercle, termi- 

 nally situated ; terminal claw long, al>out as long as the penultimate joint, 

 moderately slender, and mo^lerately curved. The cirri are rounded basally, 

 but moderately compressed in the distal two-thirds; there is no trace of 

 carination. 



Disk completely covered by a i>avement of small plates; side and cover- 

 ing plates strongly developed on the pinnule ambulacra. 



Ends of the basal rays visible as large rhombic tubercles in tlie angles of 

 the calyx ; radials concealed ; i Bri short, four or five times as broad as 

 linig, chevron-shaped, with a more or less wavy proximal and distal border, 

 in close lateral ap])Osition ; the apposed edges are somewhat thickened and 

 produced and there are a few low broad tubercles on the distal border; 

 I Bra (axillary) rhombic, twice as broad as long, rising to a rather sharp 

 dorso-ventrally elongate tubercle with the i Bri; ii Br 4 (8 -F 4) ; on three 

 of the II Br series the syzygy is replaced by a synartbry ; iii Br 2 ( 1 + 2), 

 developed interiorly. The division series are very strongly rounded dor- 

 sally and have a slightly indicated median carination ; they are in very 

 close lateral apposition and the lateral edges are slightly i)roduced and 

 everted as in Glyptometra. 



Thirty-two arms (in the type) 150 mm. long; first two or four brachials 

 oblong, short, united in syzygial pairs which are not quite so long as 

 broad; following two or three brachials oblong, somewhat over twice as 

 l)r()ad as long, then becoming wedge-shaped, twice as broad as long, and 

 slightly longer and more oblique after the proximal third of the arm, 

 where the brachials have slightly ])rominent distal ends. 



Pu 17 mm. to 20 mm. long, very slender and flagellate distal ly, with from 

 fifty to fifty-three joints: first two joints ilisproportionately large, twice as 

 liroad as long, strongly flattened exteriorly; third joint about half as broad 

 as the finst and half as long as the second, twice as broad as long ; follow- 

 ing joints to the fifteenth decreasing in diameter and increasing in length, 

 at first twice as broad as long, becoming after the fifteenth uniformly small 

 and about as long as broad ; Pi about the same length with forty-five 

 joints, similar, but much less stout basally and not ta})ering so ra})i<lly; 

 V-> l?i mm. long with about thirty joints about as stout basally as the pre- 

 ceding pinnules, but tapering much more gradually, the first eight joints 

 about three times as broad as long, then gradually becoming longer and 



