Scientific information about the segmented worms, including earthworms, polychaete worms, and leeches. Hirudinea (7) Oligochaeta (3) Pogonophora (1) Polychaeta (5) 1. UCSC Annelida - Anatomical illustrations of segmented worms from the University of California at Santa Cruz. 2. Annelida - Introduction - Annelid worms, brought to you by Biological Sciences at the University of Paisley. 3. Center for Annelida Resources - The Illinois Natural History Survey Annelida Collection is one of the largest state collections of freshwater oligochaetes in the USA, holding more than 300,000 specimens. 4. Introduction to the Annelida - Introduction to the Annelida, the segmented worms. 5. Phylum Annelida - The segmented worms, including earthworms, polychaete worms, and leeches.

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