Holland: Heads and Tails. 275 



possibly to allied genera not yet defined. There is not a single trace 

 in the bed from which these remains have come of any animal pos- 

 sessing the peculiar dentition belonging to the skull which Professor 

 Marsh originally attributed to his Brontosaurus. Such a skull has 

 indeed been found by us, but it lay far to the west of the remains of 

 the Brontosaurus which we are assembling, according to Mr. Douglass, 

 and in a layer at least eight feet higher than that in which the Bronto- 

 satirus remains were discovered, a layer which was deposited at a 

 later time and is now found to contain remains provisionally referred 

 by Douglass to Barosaurus, or an allied sauropod, characterized by 

 cervical vertebrae the centra of which are from three to four feet in 

 length. This skull cannot have belonged to the Brontosaurus which 

 we are engaged in mounting. Skulls do not wash up stream against 

 the current, nor do they burrow upward eight feet through superin- 

 cumbent sand. This skull of which I am speaking by no possibility 

 can be attributed to the large skeleton which we are setting up. 



Under the circumstances and in view of these facts the writer has 

 undertaken an investigation of the subject, with the following results: 



Professor R. S. Lull, with the most obliging courtesy, has examined 

 the records preserved at the Peabody Museum in relation to the 

 material collected and utilized by Professor Marsh when making his 

 restoration of Brontosaurus. Without going into the details of the 

 matter I may say that Dr. Lull reports to me that the skull attributed 

 by Marsh to Brontosaurus was found in Wyoming, near Como Bluffs, 

 at a locality approximately four miles distant from the spot where 

 the remainder of Marsh's type of Brontosaurus was obtained by 

 William H. Reed. Professor Lull in his written statement thus con- 

 firms the oral statement made to me years ago by W. H. Reed, who 

 Informed me that the skull utilized by Marsh did not in the judgment 

 of Mr. Reed belong to the same individual as the rest of the specimen- 

 and had nothing to do with it. 



There is another somewhat fragmentary skull of the same animal 

 preserved at the United States National Museum, in reference to 

 which Mr. C. W. Gilmore has written to me at my request. This 

 skull was obtained at the well-known locality near Canyon City, 

 Colorado, in what was known as "the Felch quarry." Mr. Gilmore 

 informs me that an examination of the charts of the quarry shows 

 that this skull was not associated with any other skeletal material 

 referable to the genus Brontosaurus. It is plain from these facts that 



