• Raising Earthworms (online book excerpts)

Leeches:

• Medicinal Leeches
• How Medicinal Leeches Swim
• Hirudinea
• Leech Neurobiology Newsletter
• INHS Center for Annelida Resources
• Leeches as Bioindicators
• Leeches: Hirudinea

Jellyfish:

• JelliesZone
• Freshwater Jellyfish Page
• Freshwater Jellyfish in Idaho
• Freshwater Jellyfish in Washington State
• Freshwater Jellyfish in Indiana
• Appalachian Mountain Jellyfish
• Worldwide deaths and severe envenomation from jellyfish stings
• Nonindigenous Coelenterate Distribution Information

Earthworms:

• New Species of Giant Earthworm in the Appalachians
• Worm Digest
• Minnesota Worm Watch
• Vermiculture

Other Invertebrates:

• The Earthworm-eating Planarian
• A Field Guide to the Anemone Fishes and their Host Sea Anemones
• A sampler on arthropod phylogeny: bibliography
• Horsehair Worms in Illinois
• Hair Snakes - 1947 Article
• Phylum Nematomorpha