Flora and Fauna
- 141
- Venus's Girdle
- Article by William Amos on his sighting of the meter-long comb jelly, Cestum, while diving and about ctenophores in general and their place in the animal kingdom.
- 142
- Echinodermata
- Characteristics and phylogeny of the spiny-skinned animals: sea urchins, starfish, and their allies.
- 143
- Gallery of Echinoderm Larvae
- A collection of photographs of developing starfish and sea urchins with information about each.
- 144
- Sea and Sky: Echinoderms
- A brief description of the phylum followed by a long list of annotated photographs.
- 145
- Echiura
- Wikipedia article on this group of marine worms that burrow into mud or sand or live in empty shells.
- 147
- Gastrotricha World Portal
- Detailed information about these small aquatic organisms, including overview, systematics, evolution, checklists, photos, and movies.
- 150
- The Sand Worms (Phylum Gnathostomula)
- Description of the tiny marine worms in this phylum and the characteristics that distinguish them from other worms.
- 151
- Hemichordata
- Information from Wikipedia on this phylum of worm-shaped marine deuterostome organisms.
- 152
- Hemichordata (Acorn Worms and Pterobranchs)
- Photograph of an acorn worm (Saccoglossus kowalevskii).
- 154
- The Phylum Hemichordata
- An introduction to the hemichordates including their characteristics and the two classes Enteropneusta and Pterobranchia.
- 157
- Wikipedia: Kinorhyncha
- Encyclopedia article on these marine invertebrates including their anatomy, classification and taxonomy.
- 158
- Lophophore
- Information from Wikipedia on the characteristic feeding organ possessed by the three major phyla Brachiopoda, Bryozoa and Phoronida.