"This paper describes six new genera of Paleozoic calcareous sponges: three inozoans, one sclerosponge, one sphinctozoan, and one heteractinid. The first five genera are abundant members of the reef fauna of the west Texas Permian; the sixth is an unusual heteractinid of the Silurian (Niagaran) Henryhouse Formation of Oklahoma. A new family of Inozoan is also established."--[p. 1].