The examination of certain specimens from the Red Crag in the collection of the British Museum, which have been already described by other writers, and the recent acquisition by the same collection of casts of a small series of remains from these deposits, which were collected by the Rev. Mr. Canham and are now in the Ipswich Museum, have enabled me to make some additions and emendations to our knowledge of the vertebrate fauna of the Red Crag which it appears desirable to notice collectively. Hyæna .—The remains of Hyæna from the Red Crag hitherto described comprise two upper and one lower third premolars, all of which are referred by Lankester to his H. antiqua , which was founded on the specimen first obtained. This so-called species was regarded as closely allied to the existing H. striata , but the specimens are really insufficient for specific diagnosis ; and it may be remarked that it is, primâ facie , exceedingly improbable that the Crag Hyæna should be distinct from all continental forms. The occurrence of H. striata in the caverns of France has been determined by Gervais, while Gaudry § remarks that the so-called H. arvernensis , Cr. & Job., from the Upper Pliocene of the Auvergne and the Val d'Arno appears undistinguishable from the existing species, although the name is still retained by Forsyth-Major∥. In recording a specimen of the maxilla of a Hyæna from the Val d'Arno in the ‘British Museum Catalogue of Fossil Mammalia’¶,I referred it unhesitatingly to H. striata ; but being