Search in gallery Cross section through a Leucosolenia sponge - Large (129 Kb) - Scroll down   to information With labels Legend: 1 central cavity 2 sponge wall (bi-layered)   English name: Leucosolenia Scientific name: Leucosolenia botryoides Familia: Leucosoleniidae Classis: Calcarea Phylum: Porifera Regnum: Animalia

http://www.vcbio.science.ru.nl/en/image-gallery/show/AN0041/print/