. Echinoderma of the Indian Museum ... Collected by the Royal Indian Marine Survey ship Investigator. .. . Fig. i6.—Mariametra margaritifera. I^ateral view of the type. Disk thickly studded 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. Radials short, about six times as broad as long, gently convex proximally and correspondingly concave distally ; IBr, short, oblong, somewhat over four times as broad as long, in lateral apposition and slightly flattened; IBr^ short,

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectechinodermata, bookye