On the shoulder girdle in ichthyosauria and sauropterygia

Abstract In a paper recently communicated to the Royal Society by Pro­fessor H. G. Seeley,* in which is discussed “The Nature of the Shoulder Girdle and Clavicular Arch in Sauropterygia,” the author challenges the validity of statements relating to this girdle made by me at the Anniversary Meeting of the Geological Society of London in 1883.