270 Cincinnati Society of Natural History. 



gone ages high up in the valle3^of the Missouri, toward the source of 

 its western tributaries, where now pasture the big - horned Ovis 

 montana, the shagg}^ buffalo, or American bison, and the elegant and 

 slenderlj^ constructed antelope. 



A section of the Tertiary- of the '' Bad lands," or, " Mauvaises 

 Terres," in descending order, is as follows : 1. Ash colored clay, 

 cracking in the sun, containing siliceous concretions, 30 feet. 2. Com- 

 pact, white limestone, 3 feet. 3. Light gray, marly limestone, 8 feet. 4. 

 Light gra3% indurated, siliceous clay (not effervescent), 30 feet. 5. 

 Aggregate of small angular grains of quartz, or conglomerate, cement- 

 ed by calcareous earth, slightly effervescent, 8 feet. 6. Layer of 

 quartz and chalcedony (probably only partial), 1 inch. 7. Light gray, 

 indurated, siliceous clay, similar to No. 4, but more calcareous, passing 

 downward into pale flesh colored, indurated, siliceous, marly limestone, 

 turtle and bone bed, 25 feet. 8. White and light gray, calcareous 

 grit, slightly effervescent, 15 feet. 9. Similar aggregate to No. 5, but 

 coarser, 8 feet. 10. Light green, indurated, argillaceous stratum 

 (slightly effervescent) ; Palseolherium bed, 20 feet. 



Dr. Joseph Leidy described, from the Eocene of Nebraska, 

 Eucrotaphus auritus^ and from the Miocene of Virginia,* Crocodilus 

 antiquus, now Thecachampsa antiquus. Prof F. Ungerf described, 

 from the Tertiary of Texas, Sillimania texana^ Ro&meria americana^ 

 and TJuUoxylon americanum. 



In 1853, Alexander Murrav;J informed us that the clays on the Ot- 

 tawa, in the vicinit}^ of Bytown, at the mouth of the Gatineau on the 

 north, and of Green's creek on the south side, in addition to marine 

 shells, yield, in the latter localit}^ two species of fish, the MaXlotus vil- 

 losus, and Cyclopterus hcmpifs, or lump-sucker, the former now living 

 and frequenting the Gulf of St. Lawrence in great numbers, and the 

 latter abounding on the northern shores of Scotland and America. 

 The fossils are enclosed in nodules of indurated cla}^ of reniform 

 shapes, and occupy a bed nearly on a level with the water of the Otta- 

 wa, and about 118 feet above the tide level of Lake St. Peter. The 

 same sort of nodules frequenth^ enclose fragments of wood, leaves of 

 trees, and portions of marine plants ; among the last is one of the 

 species of littoral algae still found near the coasts of Arctic seas. Be- 

 side the stratified deposits of clay and sand, there is a deposit of clay 

 drift, holding pebbles and bowlders, sometimes angular, but generall}^ 



* Jour. Acad. Nat. Sci., 2d ser., vol. ii. 

 t Kreid. von Texas. 

 X Geo. Sur. of Canada. 



