Title: Palaeoecology of a well-preserved crinoid colony from the Silurian Rochester shale in Ontario
Description: Inclues des photographies de Dimerocrinites lilliformis(Hall), Eucalyptocrinites caelatus(Hall), Homocrinus parvus(Hall).
Subjects: Fossil Crinoidea, Paleontology
Places: Ontario
Time periods: Silurian