Halichondriae /(hăl`ĭ*kŏn"drĭ*ē)/

Hal·i·chon·dri·ae

Halichondriae

prop. n. pl.
  1. An order of sponges, having simple siliceous spicules and keratose fibers; -- called also Keratosilicoidea. (Zool.)