“Disc large, rather flat, arms slender with upturned tips. Disc membranous, with small, distinct, widely isolated round or oval plates, these most obvious on disc centre interradially, absent or very few and scattered and indistinct from arm base to arm tip. Some plates…with a single, slender,
hyaline, tapering, generally sharp-tipped, spine. Small plates, sometimes visible along arms, without spines. …Three
cribriform organs in each interradius; each consists of 8-12 thin
lamelliform sheets of membrane-covered spines. Organs bordered by broad, conspicuous spines which form a well defined palisade on either side. Cribriform organs in angle adjacent to
madreporite; slightly larger...Tubefeet well developed, no suckers, in 2 rows in wide grooves.” (Clark, 2000, p. 119-120).
Color: "...dried from alcohol, is white or grey, with darker cribriform organs and tubefeet." (Clark, 2000, p. 120).