Porifera

Grant, R. E. (1836). Animal Kingdom. Pp. 107-118. In: Todd, R.B. (Ed.),The Cyclopaedia of Anatomy and Physiology. Volume 1, (Sherwood,Gilbert, and Piper: London): 1–813. https://www.marinespecies.org/porifera/aphia.php?p=sourcedetails&id=7516