Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
A Monograph of the Fossil Reptilia of the Liassic Formations. Part Third. Ichthyopterygia. Pages 83–134; Plates XXI–XXXIII. With Directions for Binding and Title-pages
Charles Darwin and the Origin of Species. Addresses, etc., in America and England in the year of the two anniversaries. By Edward Bagnall Poulton. New York, Longmans Green and Co.