Environmental Engineering Reference
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FIGURE 2
Photos (A, B, D, F, G, I) and X-ray radiographs (C, E, H) of vermiform animal burrows.
White bar in all photos is 2 cm long. (A)
Abarenicola pacifica
in its U-shaped burrow (
Arenicolites
).
(B) and (C) Spiral burrows constructed by the hemichordate,
Dolichoglossus pusillus
. These bur-
rows are most akin to
Gyrolithes
(Gy) and
Helicodromites
(He). (D) and (E) Thick mud linings
of terebellid polychaete burrows constructed in subaqueous gravel-dominated sediments. Note
the pebbles (P) on the outside of the burrow linings. Terebellid burrows are comparable to
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