Science Art: Development of the Gonophore…., 1891

Scientific Illustration of the development of the gonophore - reproductive cells.

Scientific Illustration of the development of the gonophore - reproductive cells. Click to embiggen

From Johns Hopkins circular “On the Structure and Development of the Gonophores of a Certain Siphonophore Belonging to the Order Auronectae (Haeckel).”

A siphonophore is a sponge; a gonophore is a reproductive cell.

This is sponge smut here is what it is.