Clark — New Recent Indian Crinoids. 145 



Mariametra margaritifera sp. nov. 



Type.— Cat. No. 57B., Indian Museum; two miles ofl' Great West 

 Torres Islands. 



Centro-dorsal rather small, discoidal. 



Cirri xxi, 30-34, 15 mm. long, the outer joints with long dorsal spines. 



Disk thickly covered with small calcareous plates along the ambulacra 

 and on the anal tube, with scattering plates in the interambulacral areas; 

 no plating after the last axillary. 



Kadials short, about six times as broad as long, gently convex proxi- 

 mally and correspondingly concave distally ; i Bri short, oblong, some- 

 what over four times as broad as long, in lateral apposition and slightly 

 flattened; i Brs (axillary) short, almost or quite triangular, two and one- 

 half or three times as broad as long, in apposition laterally; ii Br 2; radi- 

 als and portion of centro-dorsal above the proximal row of cirrus sockets 

 evenly and thickly covered with high small tubercles resend)ling those on 

 the dorsal pole of the centro-dorsal, this tubercular modification of the 

 dorsal surface of the joints extending distally in the interradial angles, 

 occupying tlie lateral third of the i Bn and the i Br^ and of the ii Br 

 series, thence diminishing in width and disappearing on tlie second 

 brachial; inner edges of the ii Br series similarly modified; i Br series 

 with a narrow and low, but prominent, tubercular keel or row of tuber- 

 cles ; this is much less marked or altogether absent on the ii Br series and 

 first two brachials, though sometimes traceable to the lowest of the tri- 

 angular brachials ; I Brand ir Br series and proximal oblong brachials 

 with prominently everted dentate proximal and distal edges; as the 

 brachials become wedge-shaped and triangular, the everted dentate ends 

 become gradually lower, transforming into a rather prominent finely 

 spinous overlap which slowly dies away distally. 



Eighteen arms (in the type) apparently 30 mm. to 35 mm. long, the 

 proportions of the brachials being approximately as in M. subcarinata. 



Pi 4 nmi. long, moderately stout basally, but tapering rather rapidly 

 in the proximal half and slender distally, with twelve joints, the first three 

 squarish, the following increasing in length and becoming about three 

 times as long as broad distally; P2 6 mm. long, slender, but stouter than 

 Pi and somewhat stiflened, with about sixteen joints, at first squarish, 

 but becoming three or four times as long as broad distally ; P3 similar to 

 P2 and about the same size ; following pinnules 3 mm. long, small and 

 weak ; distal pinnules delicate, 5 mm. long. 



Family COLOBOMETRID.E. 



Genus CENOMETRA A. H. Clark. 



Cenometra herdmani sp. nov. 



Antedon bella (not of Hartlaul)) 1904. Cuadwick, in Herdman, Report 

 Ceylon Pearl Oyster Fisheries, Suppl. Rep. xi, p. 155. 



Type.— Cat. No. H— j Indian Museum; Ganjam Coast, Bay of Bengal; 

 12 fathoms. 



This species resembles C. unicornis in general appearance, but is more 



