The University has considerable Cretaceous vertebrate material. He will dispose of one the duplicate sauropod material now con- tained in three ranges of drawers, each about nine feet high for $500. Or he will select anything to illustrate the osteology of the three genera, Tylosaurus, Plateosaurus, and Clidastes for $250. The first two genera will be represented by a skull and jaw but Clidastes only by jaws. He either lot in tables all material will be labeled and packed at that price. All of this material is practically clean for the study series but for exhibition purpose requires mounting. In case of single specimens he will let us have a good jaw of Tylosaurus (displaced) dispels away from fur long and mounted for $200. Of T. frengel, a small jaw skull, though me preserving over the pala- tal again, unmounted, for $40.