scopularia

from The Century Dictionary.

• noun In Sollas's classification of sponges, a tribe of dictyonine hexactinellidan Silicispongiæ, having uncinate spicules in the form of scopulariæ.
• noun In Sollas's nomenclature of sponge-spicules, a scopulate or besom-shaped spicule with tylolate or knobbed rays which vary in number from two to eight; a scopula.