spicules

Venus’s Flower basket Euplectella aspergillum with inset showing the lattice work of structural details. Illustration from “30 Animals that made us smarter” by Patrick Ayree (BBC Books)

Small pen and ink sketch with stippled texture and a watercolour top wash, cut to white

Earthworm coiled and curled up showing its saddle and segmentation clearly, cut to white

Worm against grassy background, looking like it should be under the ground rather than crawlign about on top of it

pen and ink stippled diagram of a worm with detail of the spines that help earthworms move

Earthworm coiled and curled up showing its saddle and segmentation clearly, cut to white