Croonian Lecture.- Researches on the Structure, Organization, and Classification of the Fossil Reptilia. - II. On Pareiasaurus bombidens (Owen), and the Significance of its Affinities to Amphibians, Reptiles, and Mammals. Received April 21, - Read May 12, 1887

(London, Harrison and Sons, 1889). 4to. No wrappers as extracted from "Philosophical Transactions" 1888 - Vol. 179- Series B., Pp. 59-109 a. 10 fine lithographed plates. Textillustr.

First printing of an importent work in the taxonomy of dinosaurs and extinct reptilia.
Harry Govier Seeley was a British paleontologist who determined that dinosaurs fell into two great groups, the Saurischians and the Ornithischians, based on the nature of their pelvic bones and joints. He published his results in 1888, from a lecture he had delivered the previous year. (the paper offered).

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