Part E, Porifera (Revised), vol. 2, Ch. 1, p. 1-62 Authors R. E. H. Reid Department of Geology, The Queens University of Belfast J. Keith Rigby Department of Geology, Brigham Young University DOI: https://doi.org/10.17161/dt.v0i0.5137 Downloads PDF Published 2016-01-08 Issue Part E, Porifera (Revised), vol. 2 (2003) Section Chapters License https://creativecommons.org/licenses/by/4.0/