Spongiary

Zool. [ad. mod.L. Spongiaria (pl.), f. L. spongia SPONGE sb.¹] A sponge.

1860.  Edinb. New Philos. Jrnl., XII. 223. The spongiaries…, or skeletons, or remains of the sponge after the death and decomposition of the live jelly, or living being. Ibid. A great many spongiaries are not amorphous, but have very distinct forms.