23 .-- Skull of _Diplodocus_ from Bone-Cabin Quarry, north of Medicine Bow, Wyoming.] "The remainder of the skeleton is modelled in plaster, the scapula, humerus, radius and ulna from the skeleton in the Yale Museum, the rest principally from specimens in our own collections.

The modelling of the skull is based partly upon specimens in the Yale Museum, but principally upon the complete skull of Morosaurus shown in another case.
"Mounted by A.Hermann, completed Feb.

10, 1905." _Diplodocus._ The _Diplodocus_ nearly equalled the Brontosaurus in bulk and exceeded it in length.

A skeleton in the Carnegie Museum at Pittsburgh measures 87 feet in total length; although the mount is composed from several individuals these proportions are probably not far from correct.

The skull is smaller and differently shaped and the teeth are of quite different type.