3IesozolG and Coinozolc Geology and Paloiontology. 267 



Miocene of Suffolk and Yorktown, Virginia, and other places, JEulima 

 ehorea^ E. migrans, OdostomiaUinnia, O.protexta, Delphinula arenosa, 

 now Angaria arenosa, Bulla suhspinosa. From the Eocene of the South- 

 ern States, "^ Kellia ohlonga, Tellina perovata, Cytherea lenis, JSfitGida 

 impressa, now Toldia impressa, y. claih omens is, jV. par His, Lithodomus 

 claihornensis, now Lithophagus claibornensis, Cerithium claibornense, 

 Amphidesma perorAitum, and Psammohia mississippiensis, now Gari 

 mississippiensis. From the Columbia river,f near Astoria, Nucida 

 ahrupta, JST. cuneiformis^ N. divaricata, JSf. penita, Mactra albaria, 

 Tellina oregonensis, T. obruta, Loripes parilis, Solen curtus^ Cytherea 

 oregonensis, C. vespertina, Bulinus petrosus, now Cylichna petrosa, 

 Pyemia modesta, and Fusus oregonensis. 



Dr. Joseph Leid>^]; described, from the Miocene of Nebraska and 

 the west, Pmbrotherium ivilso7ii, and Jferycoidodoji culbertsoni, now 

 Oreodon culbertsoni. Dr. S. G. Morton described, from the Eocene of 

 Washington county, Alabama, Cidaris alabamensis, and Galerites 

 agassizi. And Dr. Eobert W. Gibbes described, from the Eocene of 

 South Carolina, Carcharodon mortoni, C. acatidens, C. lancifonnis, 

 Oxyrhina sillimani, Otodus Icevis, and Glyphis subulata. 



In 1849, T. A. Conrad§ described, from the Upper Eocene of Vicks- 

 burg, Mississippi, Clavella vicJcsburgensis. now Fasciolaria vicksburg- 

 ensis, Fulgur nodalatum, and Triton subalveatus. And Robert W. 

 Gibbes described, from the Eocene of South Carolina, Galeocerdo con- 

 tortus, and Oxyrhina wilsoni. 



In 1850, W. E. Logan|| said that in the valleys of the Gouffre and 

 the Murraj^ Ba}^ rivers, as well as along the margin of the St. Law- 

 rence between them, there are, at various parts, great accumulations of 

 clay and sand, with some gravel; and it is very perceptible that while 

 they often present a confused aggregation of hummocks in the lower 

 grounds, at higher levels, lying in horizontal beds, they are arranged 

 into a succession of opposite terraces of equal height along the sides of 

 the valle3's, and corresponding terraces at intervals along the St. Law- 

 rence, all probably marking ancient beaches or periods of retrocession 

 of a Tertiarj" sea by the elevation of the land. One of these terraces, 

 in the valle}^ of the Gouffre, has a height, as indicated by a spirit level, 

 of 130 feet above the Bay St. Paul, and another has a height of 360 feet. 



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

 f Am. Jour. Sci. and Arts, 2d ser., vol. v. 

 X Proc. Acad. Nat. Sci., vols. iii. and iv. 

 § Jour. Acad. Nat. Sci., 2d ser., vol. i. 

 II Geo. Sur. of Canada. 



