The Earthworks at Fort Ancient, 277 



but one, at least, was a laud tortoise. The number of species and 

 genera is in striking contrast with the single species, represented by a 

 multitude of individuals in the Tertiary deposits of White river, 

 Dakota, and Niobrara river, Nebraska. 



The turtle remains mostly consist of the shells, often nearly com- 

 plete, and sometimes including other bones of the skeleton imbedded in 

 the interior matrix. 



The remains of crocodiles, which are entirely wanting in the White 

 river and Niobrara Tertiaries just mentioned, are frequent in the 

 Bridger beds, and represent several species. 



Remains of lizards also, allied to the modern iguana and monitor, 

 are found as associates of the Bridger fauna. 



Professor Marsh has likewise reported the discovery of remains of 

 serpents, which he ascribes to several species and genera. 



i\[ultitudes of well preserved fresh water fishes are found in the Green 

 river shales. They are chiefly cyprinodonts and herrings, and, for the 

 most part, have been described by Professor Cope. , 



Black, shining, enameled scales, teeth, and vertebr£e of ganoid fishes 

 are frequent among tlie fossils of the Bridger beds. 



The Tertiary strata of Green river and its tributaries, including the 

 latter, as indicated by the character of the vertebrate fossils, are much 

 older than the tertiaries of the Mauvaises Terres of White river, Da- 

 kota, and of the Niobrara river, Nebraska. They overlie the cretaceous 

 rocks, with which they are unconformable, and they are probably con- 

 temporaneous with the Eocene formations of Europe. 



The Eadh Works at Fort Ancient. 



On Tuesday, the 23d day of June, 1874, the Cincinnati Society of 

 Natural Hist(jrv made an excursion to Fort Ancient, to view some of 

 the ruins of great earthworks, constructed by an unknown race of peo- 

 ple, whom the archaeologists call the Mound Builders. 



A special car was chartered for the occasion, and at 9 o'clock, A.M., 

 it left the depot of the Little Miami Railroad, and arrived at Fort 

 Ancient about 11 o'clock. The distance is forty-two miles. 



The company consisted of Dr. W. H. Mussey, Dr. Gustav Bruehl, 

 U. P. James, Dr. C. A. Miller, Dr. H, H. Hill, wife and the Misses 

 Hill, Dr. J, L. Dryer, Dr. R. M. Byrnes and wife, R. B. Moore, wife 

 and ladies, L. !S. Cotton, wife and ladies, Paul Mohr, Jr., and the 



