IV CONTENTS. 



PART III. 



AETICLE VIII. 



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 



AETICLE IX. 



Notes on a Map intended to Illustrate Five Types of Earth-surface in the United States, be- 

 tween Cincinnati and the Atlantic. By J. P. Lesley (with a map, VI), .... 307 



A UTICLE X. 

 On Fucoides in the Coal Formations. By Leo Lcsquereux (with a plate, VII), . . . 313 



ARTICLE XI. 



Notes upon the Geology of some portions of Minnesota, from St. Paul to the Western Part of 



the State. By James Hall, ............. 329 



AETICLE XII. 



A Contribution to 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 



AETICLE XIII. 



Synopsis of the Cyprinidas of Pennsylvania. By Prof. Edward D. Cope (with four plates, X, 



XI, XII, XIII), : . . 351 



Supplement on some New Species of American and African Fishes, ...... 400 



ARTICLE XIV. 



On Species of Forest Plants from the Tertiary of the State of Mississippi. By Leo Lcsquereux 



(with ten plates, XIV, XV, XVI, XVII, XVIII, XIX, XX, XXI, XXII, XXIII), . .411 



AETICLE XV. 



On the Phalangia and Pedipalpi collected by Professor Orton in Western South America, with 



the Description of New African Species. By II. C. Wood, Jr., M.D. (with a plate, XXIV), 435 



A kTICLE XVI. 



Eemarks on Thirteen New Species of Crinoidea from the Palaeozoic Bocks of Indiana; Ken- 

 tucky, and Ohio, and a Description of certain Peculiarities in the Structure of the Col- 

 umns of Dolatocrinus, and their Attachment to the Body of the Animal. By Sidney S. 

 Lyon (with two plates, XXV, XXVI), 443 



