58 Oeological Society. PE,OCEEDINGS OF LEARNED SOCIETIES. GEOLOGICAL SOCIETY. November 23, 1887.— Prof. J. ^N. Judd, E.R.S., President, in the Chair. The following communications were read : — 1. " Note on a New Wealden Iguanodont, and other Dinosaurs." 13y P. Lydekker, Esq., B.A., E.G.S. The new species of I;/uanodon was founded upon a left ilium and ischium, parts of the pubis and tibia, two metatarsals, several dorsal, lumbar, and caudal vertebrae and other bones, obtained by Mr. C. Dawson, E.G.S., from the Wadhurst clay of the Hastings Sand. The species now described, which was named after the discoverer,, and Iguanodon PrestwicJii, were shown to form a peculiar and aberrant group of the genus lyuanodon. A maxilla from the Wealden of the Isle of Wight was also described and referred to Ornithoj^sis, The recent examination by the author of the remains of Dino-sauria in the British Museum for the purpose of preparing a Catalogue, had enabled him to make several notes on the various forms represented in the collection, and these notes were embodied in the present paper. The principal subjects mentioned were the-following : — The identification of Iguanodon Sceleiji with /. bernis-sartensis; the genera Bplienospondyhis and Cumnoria of Prof. Seeley ; a British species of Trachodon from the Cambridge Green-sand ; an ilium, provisionally referred to Uylaosaunis, from Cuck-field ; the genera Vcctisaums and Mcgtioscmrvs ; the relations of the Sauropoda and Thcropoda ; the type specimen of Omithopsis BulJcei ; the similarity of the humerus in Pelorosaurns and Bronto-saurus ; the vertebrae and other remains of Cetioscmrns ht-evis : the humerus of C. liiimerocristatus and its relations to IscJiyrosaunis, Hulke, Gigantosaurus, Seeley, and Omithopsis Leedsii, Hulke ; the affinities between Cetiosaurus oxoniensis and Morosauriis ; the occurrence of Titanosaurus in the "Wealden of England and the possible identification of that genus with Binosaums of Owen ; the vertebrae described by Owen as Bothriospondylus magniis ; the-types of the genera Thecospondi/lus and BotliriospondyJus ; and some Megalosaurian teeth. 2. " On the Cae-Gwyn Cave." By T. M'Xenny Hughes, M.A., F.G.S., Woodwardian Professor of Geology, Cambridge. The subject fell into two divisions : the Age of the Drift out-side the Cave, and the relation of the deposits in the cave to that Drift. The Author contended that the drift outside the cave was a
BioStor
