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.