II.-THE WRITINGS OF TIMOTHY ABBOTT CONRAD. 



Conrad, T. A. Observations on a portion of the Atlantic Tertiary region, with a de- 

 scription of New Species of organic remains. <C2A Bull. Proc. Natl. Institution, 



pp. 171-194, pis. i and ii. Washington, 1842. 



Page. 



Section of the cliflf at Claiborne - 17i 



Classification of Tertiary foi-mations 176 



Table of Atlantic supracretaceous deposits 177 



Geographical range of Lower Tertiary 178 



Geographical range of Medial Tertiary 179 



Localities of the Upper Tertiary ™ 176 



Medial Tertiary period -- - 180 



Section at Fair Haven 181 



List of species obtained — 181-182 



(Section) Cliff near Beckett's ~ 182 



(List of fossUs) —. ...^. .m^ 185 



(Section) Saint Mary's Eiver ~ 185 



Organic rem.ains found on Saint Mary's Kiyer 186-187 



Post-Pliocene period — 187 



Upper Tertiary formation .......~ 187 



(Sections near Patuient River) 188 



Section near the mouth of Potomac 189 



(List of species) — 190 



List of Fossil shells at Benner's - 191-192 



Descriptions of new Tertiary fossils - — 192 



Lower Tertiary or Eocene fossils 192 



Ostrea, Linnasns • 192 



O. sellce/ormis, n. s., Conrad, 1842, pL 1, fig. 1 — 192-193 



Pholadomya — — 193 



P. marylandica, n. s., Conrad, 1842, pi. i, flg. 8 193 



Pholag ■- 193 



P.petrosa, n. s., Conrad, 1842, pL ii, fig. 4 193 



Isoeardia, Lamarck —• 193 



/. markoei, n. s., Conrad, 1842, pi. ii, flg. 1 193 



Pecten, Lamarck — ...— 194 



P. humphreysii, n. s., Conrad, 1842, pi. ii, flg. 2 194 



Dispotota, Say ~ 194 



D. constricta, n. s., Conrad, 1842, pi. i, flg. 2 194 



Scalaria, Lamarck - - 194 



S. expansa, n. s., Conrad, 1842, pi. ii, flg.3 194 



Bucei7ium, Lamarck •— 194 



B. integrum, n. s., Conrad, 1842, pi. ii, flg. 5.~ ^. 194 



SeuteUa, Lamarck 194 



S. aberti, n. s., Conrad, 1842 194 



CoNKAD, T. A. [Descriptions of the fossil shells of Astoria, Oregon.] <^U. S. Expl. 

 Exp. under the command of Charles Wilkes, vol. x, Geology, Appendix i, pp. 



723-728, pis. xvii-xxi. Philadelphia, 1849. 



Page. 



Jfj/a abrupta, n. s., Conrad, 1849, pi. xvii, figs. 5, 5 a — 723 



Thrada trapezoides, n. s., Conrad, 1849, pi. xvii, figs. 6 a,b 723 



Solemya ventricosa, n. s., Conrad, 1849, pi. xvii, figs. 7,8 723 



205 



