Worms (or Annelids) wind in and out of the mud, leaving their tracks and tubes for later ages.
"The Story of Evolution" by Joseph McCabe
The mud in many places was thrown up by numbers of some kind of worm, or annelidous animal.
"A Naturalist's Voyage Round the World" by Charles Darwin
But the marine annelids, of which nereis, or a clam-worm, is a good example, are more typical.
"The Whence and the Whither of Man" by John Mason Tyler
He was afterwards associated with H. Milne Edwards in works on annelid worms.
"Lamarck, the Founder of Evolution" by Alpheus Spring Packard
Sometimes an annelid worm lives inside the shell along with the hermit and often the outside is covered with zoophytes.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
EARTHWORM, the name applied to segmented worms (Annelids) that burrow in the soil, and belong to the ord.
"The New Gresham Encyclopedia" by Various
More obvious are the worm-casts in sand left by the sand-dwelling marine annelids.
"Stories of the Universe: Animal Life" by B. Lindsay