Annelid worms are segmented. They have a brain with various bundles of nerves surrounding it. They normally reproduce sexually and live in most environments. They don't have any respiratory organs.

There are around 9,000 species of known annelid worms.

One example is the giant Palouse earthworm, also known as Driloleirus americanus. This worm can burrow down 16 feet to escape drought.

Another example is the North Auckland worm, also known as Spenceriella gigantea. This worm can grow to have a diameter of 11 mm.
http://www.bu.edu/gk12/eric/Annelida.pdf

http://www.earthlife.net/inverts/annelida.html