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CONTENTS OF PAET I. 



Page 



I. Plantse Fendlerianae Novi-Mexicanae : An Account of a Collection of Plants made 

 chiefly in the Vicinity of Santa F6", New Mexico, by Augustus Fendler ; with 

 Descriptions of the New Species, &c. By Asa Gray, M. D. . . . 1 



II. Upon the Geological Action of the Tidal and other Currents of the Ocean. By 



Charles Henry Davis, A.M., U. S.N. (With three Plates.) . . .117 



III. History and Transformations of Corydalus cornutus. By S. S. Haldeman, A. M. 



(With a Plate.) 157 



IV. Internal Anatomy of Corydalus cornutus, in its Three Stages of Existence. By Jo- 



seph Leidy, M. D. (With two Plates.) 162 



V. Contributions to the Bryology and Hepaticology of North America. By William 



S. Sullivant, A. M. Part II. (With five Plates.) 169 



VI. Description of the Observatory at Cambridge, Massachusetts. By William Cranch 



Bond, A. M. (With six Plates.) 177 



VII. On some Applications of the Method of Mechanical Quadratures. By George P. 



Bond 189 



VIII. Illustrations of Fossil Footprints of the Valley of the Connecticut. By James Deane, 



M. D. (With nine Plates.) 209 



