John Allen Howe, 1911 Encyclopædia Britannica, Volume 7… (1911)
“ Among the fossils in the English Corallian rocks corals play an important part, frequently forming large calcareous masses or “doggers”; Thamnastrea, Thecosmilia and Isastrea are prominent genera. Ammonites and belemnites are abundant and gasteropods are very common (Nerinea, Chemnitzia, Bourgetia, &c.) . Trigonias are very numerous in certain beds (T. perlata and T. mariani) . Astarte ovata, Lucina aliena and other pelecypods are also abundant. The echinoderms Echinobrissus scutatus and Cidaris florigemma are characteristic of these beds. ”
