Early Journal Content on JSTOR, Free to Anyone in the World This article is one of nearly 500,000 scholarly works digitized and made freely available to everyone in the world by JSTOR. Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than 200 of the oldest leading academic journals. The works date from the mid-seventeenth to the early twentieth centuries. We encourage people to read and share the Early Journal Content openly and to tell others that this resource exists. People may post this content online or redistribute in any way for non-commercial purposes. Read more about Early Journal Content at http://about.jstor.org/participate-jstor/individuals/early- journal-content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not-for-profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact [email protected]. TRANSACTIONS OP THE AMERICAN PHILOSOPHICALSOCIETY, HELD AT PHILADELPHIA, FORPROMOTING USEFUL KNOWLEDGE. VOL. XIII.-NEW SERIES. PART III. 1PAGE ARTICLE VIIl.--On the Hydrology of the Basin of the River Saint Lawrence. By Thomas Evans Blackwell, M. I C. E. (with two plates, IV, V), ............... 249 ARTICLE IX.-Notes on a Map intended to illustrate Five Types of Earth-surface in the United States, between Cincinnati and the Atlantic. By J. P. Lesley (with a map, VI), . 307 ARTICLE X.-On Fucoides in the Coal Formations. By Leo Lesquereux (with a plate, VII), . 313 ARTICLEXI.-Notes upon the Geologyof someportions of Minnesota,from St. Paul to the Western Part of the State. By JctmesHall, . ................. 329 ARTICLE XII.-A Contributionto the Knowledge of the Flora of the Coal Period in the United States. By Horatio C., Wood, Jr., M.D. (with two plates, VIII, IX), . 341 ARTICLE XIII.-Synopsis of the Cyprinidceof Pennsylvania. By Prof. Edward D. Cope(with four plates, X, XI, XII, XIII), ........ ............. 351 Supplementon some New Species of American and African Fishes,.. 400 ARTICLEXIV.-On Species of Forest Plants from the Tertiary of the State of Mississippi. By Leo Lesquereux(with ten plates, XIV, XV, XVI, XVII, XVIII, XIX, XX, XXI, XXII, XXIII), ............................. 411 ARTICLE XV.-On the Phalangia and Pedipalpi collected by Professor Orton in WesternSouth America, with the Description of New African Species. By H. C. Wood, Jr., M.D. (with a plate, XXIV), . .. 435 ARTICLE XVI.-Remarks on Thirteen New Species of Crinoideafrom the PalceozoicRocks of Indi- ana, Kentucky,and Ohio, and a Description of certain Peculiarities in the Structureof the Columnsof Dolatocrinus, and their Attachment to the Body of the Animal. By Sidney S. Lyon (with two plates, XXV, XXVI), .................. 443 @i) I Ipaa r I i a: PUBLISHED BY THE SOCIETY, AND FOR SALE BY HENRY C. LEA, PHILADELPHIA; N. TRUBNER & CO., 60 PATERNOSTER ROW, LONDON. PRINTED BY SHERMAN & CO. 1869. EXTRACT FROM THE LAWS OF THIE SOCIETY RELATING TO THE TRANSACTIONS. 1. Every communication to the Society which may be considered as intended for a place in the Transactions, shall immediately be referred to a committee to consider and report thereon. 2. If the committee shall report in favor of publishing the communication, they shall make such corrections therein as they may judge necessary to fit it for the press; or, if they shall judge the publication of an abstract or extracts from the paper to be more eligible, they shall accompany their report with such abstract or extracts. But if the author do not approve of the corrections, abstract, or extracts reported by the committee, he shall be at liberty to withdraw his paper. 3. Communications not initended by their authors for publication in the Transactions, will be received by the Society, and the title or subject of them recorded; and, if they be in writing, they shall be filed by the secretaries. 4. The Transactions shall be published in numbers, at as short intervals as practicable, under the direction of the Committee of Publication, and in such a form as the Society shall from time to time direct; and every communication ordered to be published in the Transactions shall be immediately sent to the printer, and fifty copies thereof be given to the author as soon as printed. 5. The order in which papers are read shall determine their places in the Transactions, unless otherwise ordered by the Society; priority of date giving priority of location. 6. The expenses of publishing the Transactions shall be defrayed by subscriptions and sales, aided by such funds as the Society shall from time to time appropriate for that purpose. COMMITTEE OF PUBLICATION. MR. T. P. JAMES, DR. CARSON, PROF. C. B. TREGO, MR. E. K. PRICE, MR. TILGHMAN. OFFICERS OF THE AMERICAN PHILOSOPHICAL SOCIETY, FOR THE YEAR 1869. PATRON, .. His Excellency, the Governor of Pennsylvania. PRESIDENT, .... George B. Wood. John C. Cresson, VICE-PRESIDENTS, . ? Isaac Lea, l Frederick Fraley. rCharles B. Trego, E. Otis Kendall, SECRETARIES, . John L. Le Conte, J. P. Lesley. Franklin Peale, CURATORS, . -< Elias Durand, ( Joseph Carson. TREASURER, . Charles B. Trego. I Alfred L. Elwyn, John Bell, COUNSELLORS,elected for three years. In 1867, . Benj. I. Coates, L Benj. V. Marsh. FIsaac Hays, In 1868, . Robert E. Rogers, Henry C. Carey, Robert Bridges. Frederick Fraley, J Robert Patterson, In 1869, . Daniel R. Goodwin, l E. K. Price. LIBRARIAN, .............. J. Peter Lesley. LIST OF MEMBERS OF THE AMERICAN PHILOSOPHICAL SOCIETY, ELECTED SINCE THE PUBLICATION OF THE TWELFTH VOLUME. J. E. Hilgard, Ass. U. S. C. Sur., of Washington. Alphonse Count de Gasparin, of Paris. Charles A. Schott, Ass. U. S. C. Sur., of Washington. Peter Tunner, Prof. School of Mines, of Leoben. Thomas E. Blackwell, of Montreal. A. Thury, of Geneva. Benjamin W. Richardson, M.D., of London. A. Tholuck, Prof. Theol. Halle an der Saale. Thomas Hill, Pres. Harvard Coll., Cambridge. Carl Schinz, M.D., of Strasbourg. William D. Whitney, Prof. Yale Coll., New Haven. William Sellers, of Philadelphia. Chester Dewey, Prof. Rochester University, N. Y. R. S. Smith, Pres. Girard College, Philadelphia. William H. Green, Prof. Theo. Sem., Princeton, N.J. Alexander Wilcocks, M.D., of Philadelphia. Hon. James Pollock, Direc. U. S. Mint, Philadelphia. Joseph Harrison, of Philadelphia. E. A.Washburne, Rector ofSt. Mark's, Philadelphia. John Foster Kirke, of Massachusetts. James McClune,Prof. Ast. C. High School, Phila. Geo. H. Cooke, Prof. of Geol., N. Brunswick, N. J. Calvin Pease, D.D., of Rochester. Thomas C. Porter, Prof. of Theol., Lancaster, Pa. John Biddle, of Philadelphia. John Bost, Pasteur h Laforce, pr6s de Bergerac, Henry Hartshorne, M.D., of Philadelphia. France. David F. Eschricht, M.D., of Copenhagen. Charles T. Krauth, D.D., Prof. Theol. of Phila. C. G. N. David, M.D., of Copenhagen. R. H. Lamborn, Metallurgist, of Philadelphia. Frederick Keller, M.D., of Zurich. Ovid Brunet, Prof. Bot., Quebec. Peter W. Sheafer, Geologist, of Pottsville, Pa. Goldwin Smith, of Oxford, England. A. Delesse, Prof. Ecole des Mines, Paris. Alex. Winchell, Prof. Geology, Michigan. A. Daubree, of Paris. William E. Whitman, of Philadelphia. R. AM.S. Jackson, M.D., of Cresson, Pa. George J. Brush, Prof. Chem., N. Haven, Conn. R. A, F. Penrose, M.D., of Philadelphia. S. A. Allibone, of Philadelphia. Robert B1riggs,of Philadelphia. S. A. Haven, of Worcester, Mass. Joseph Lesley, of Philadelphia. C. D. Cleveland, of Philadelphia. A. Morlot, of Lausanne. James B. Francis, of Lowell, Mass. Thomas Chase, Prof. Nat. Hist. Haverford Coll., Pa. George C. Schaiiffer,of Washington, D. C. Benjamin V. Marsh, of Philadelphia. Timothy B. Conrad, of Philadelphia. James T. Hodge, Geologist, of New York. Thomas S. Blair, of Pittsburgh, Pa. George Kirchoff, Prof. Univ. Heidelberg. E. D. Cope, Prof. Nat. Hist., Haverford, Pa. Fran9ois J. Pictet, Prof. Acad. of Geneva. Horatio C. Wood, Prof. N. H., University of Pa. Benjamin Studer, Prof. Univ. Berne. George Davidson, U. S. Coast Survey. LIST OF MEMBERSELECTED. vii Charles Hale, U. S. Consul Gen. at Alexandria. Frederick Graff, of Philadelphia. William Strong; J. Sup. Court of Pennsylvania. Edward Rhoads, of Philadelphia. Pliny Earle, of Northampton. Ulysses S. Grant, President of the United States. Owen J. Wister, of Germantown, Pa. John Tyndall, of London. Thomas Davidson, of Brighton, England. Charles E. Anthon, of Columbia College, N. Y. Fridolin Sandberger, of Wurtzburg, Bavaria. 0. C. Marsh, of Yale College, New Haven. William P. Schimper, of Strasbourg. Traill Green, of Lafayette College, Easton. Robert J. Breckenridge, of Danville, Ky. William M. Canby, of Wilmington, Del. Jeffries Wyman, of Cambridge, Mass. George H. orne, of Philadelphia. Jacob M. Da Costa, M.D., of Philadelphia. William M. Gabb, of Philadelphia. Ralph Waldo Emerson, of Concord, Mass. Hakakian Bey, of Cairo. Charles Sumner, of Boston, Mass. Linant Bey, of Cairo. John Cadwalader, of Philadelphia. Auguste Mariette Bey, of Cairo. Harrison Allen, of Philadelphia. Dr. Ceselli, of Rome. Andrew Mason, of New York. Emmanuel De Rouge, of Paris. George F. Dunning, of New York. Heinrich Brugsch, of Berlin. B. F. Shumard, of St. Louis, Mo. Johannes Dimichen, of Paris. J. S. Newberry, Columbia College, New York. Frangois Chabas, of Chalons sur Saone. M. B. Anderson, of Rochester, New York. Samuel Birch, of London. Henry Morton, of Philadelphia. Edward Lartet, of Paris. Charles J. Stille, of Philadelphia. Joseph Prestwich, of London. J. H. Packard, of Philadelphia. Carl L. Riitimeyer, of Basel. John F. Frazer, of Philadelphia. William H. Flower, of London. tIenry S. Osborn, of Easton, Pa. George Rolleston, of Oxford, England. Hubert A.