Guide to the coral gallery (Protozoa, Porifera or sponges, Hydrozoa, and Anthozoa) : in the Department of Zoology, British Museum (Natural History) ...
London :Printed by order of the Trustees [by W. Clowes and sons, limited],1907.
Wellcome Library (archive.org)
Public domain. The BHL considers that this work is no longer under copyright protection.