Contains black & white drawings of; Radiolaria, Foraminifera, Ciliata, diatoms, calcareous sponges, Siphonophora, star corals, starfishes, Protozoa, flagellates, brown seaweed, jellyfishes, sea-lilies, moss animals, sea-urchins, glass sponges, leptomedusae, horny corals, trunkfishes, true sea slugs, anthomedusae horseshoe crabs, sea-cucumbers, octopuses, bats, orchids, sea wasps, seahorse, a dragonfish, a frogfish, and much more.