3IesozoiG and CcBnozoic Geology and Paloiontologij. 1G9 



Miocene of SnfFolIc iind Yorktowii, Virginia, and other places, Eulima 

 eborea, U. migrans, Odostomia Umjiia, 0. 2^1'otexta., Delphinula arenosa, 

 now Angaria arenosa. Bulla subspinosa. From the Eocene of the South- 

 ern States,* Kellia oblonga, Tellina perovata, Cytherea lenis, JSTacula 

 impressa, now Yoldia impressa, iV. claibornensis, N'.x)arilis, Lithodomus 

 elaibornensis, now Lithophagus claibornensis, Cerithium claibornense, 

 Amphidesma perovatum, and Psammobia mississippiensis, now Gari 

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

 abrupta, N. cuneiformis, N. divaricata, iV. penita, Mactra albaria, 

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

 oregonensis, C vespertina, Bulinus petrosus, now Cylichna petvosa, 

 Pyrula modesta, and Fusus oregonensis. 



Dr. Joseph Leid^yJ described, from the Miocene of Nebraska and 

 the west, Pcebrotherium xoilsoni, and Merycoidodon culbertsoni, now 

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

 Washington count^^, Alabama, Cidaris alabamensis, and Galerites 

 agassizi. And Di-. Robert W. Gibbes described, from the Eocene of 

 South Carolina, Garcharodon mortoni, C. acittidens, C. lanciformis, 

 Oxyrhina sillimani, Otodus Iwvis, and Glyphis subulata. 



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

 burg, Mississippi, Clavella vicJcsburgensis. now Fasciolaria vicksbiirg- 

 ensis, Fnlgur nodtdatum, and Triton subalveatus. And Robert W. 

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

 torttis, and Oxyrhina wilsoni. 



In 1850, W, E. Logan|| said that in the valle^ys of the Gouffre and 

 the Mnrraj' 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 valleys, and corresponding terraces at intervals along the St. Law- 

 rence, all probably marking ancient beaches or periods of retrocession 

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

 in the valley 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. 

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

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

 II Geo. Sur. of Canada. 



