Sharks, Skates, Rays, and Chimaeras

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Skates and rays have a more-or less flattened appearance, and all ex cept a few are either wholly or partially covered with denticles or Spines, which may be scattered irregularly or ar ranged in definite patterns. ...