This skeleton partly supplemented the first.  Mr. W.H. Utterback was found near the Powder River in Wyoming, part of a remarkable tail consisting of thirty severe vertebrae in serial order, the last twenty of which were so small and so nearly of the same size that if they had not been placed together properly.  The last vertibra had a posterior articular face which showed that the end was not yet.  It seemed ridiculous that this giant reptile should have such a long slender, apparently almost interminable tail, but the anterior vertebrae were like the corresponding vertebrae of Diplodocus.