A. H. CLARK : THE CRINOIDS OF THE INDIAN OCEAN. l^J 



MARIAMETRA MARGARITIFERA. 



Mariametra margaritifera 1909. A. H. Clark, Proc. Biol. Soc. Washington vol 

 22, p. 145. '' ' 



Description.— Centrodorsal rather small, discoidal. 



Cirri XXI, 30-34, 15 mm. long, the outer segments with long dorsal spines. 



■Fig. i6.— Mariametra margaritifera. 

 Lateral view of the type. 



Disk thickly studded with «mall calcareous plates along the ambulacra and 

 o the anal ube w.th scattering plates in the interambulacral areas ; no plating 

 alter the last axillary. * 



Radials short about six times as broad as long, gently convex proximaUy 

 and correspondingly concave distally; IBr, short, oblong, .somewhat over four 

 tmies as broad as long, in lateral apposition and shghtly flattened ; IBr, short 



