At some places in the neighbourhood the softer mass is divided by thin flags of hard limestone, and bryozoa placed in the upright position in which they grew.
"The Student's Elements of Geology"
Sir Charles Lyell
No less than 130 species of bryozoa have been found in the Coralline Crag, and some belong to genera unknown in the living creation, and of a very peculiar structure; as, for example, that represented in Figure 127, which is one of several species having a globular form.
"The Student's Elements of Geology"
Sir Charles Lyell
In its most calcareous form the Mountain Limestone is destitute of land- plants, and is loaded with marine remains- the greater part, indeed, of the rock being made up bodily of crinoids, corals, and bryozoa with interspersed mollusca.
"The Student's Elements of Geology"
Sir Charles Lyell