CONTENTS OF PART I. 



PACE 



I. Astronomical, Magneticnl, and Meteorological Observations, made at Panama, 



New Grenada. By W. H. Emory. . , 1 



II. Plan of an Ancient Fortification at Marietta, Ohio. By Winthrop Sargent. 



(With a Plate.) 25 



III. Researches upon the Origin, Mode of Development, and Nature of the Spermatic 



Particles among the Four Classes of Vertebrated Animals. By Waldo J. 

 Burnett, M. D. (With a Plate.) 29 



IV. A History of the Fishes of Massachusetts. By David Humphreys Storer, M. D., 



A. A. S. (With Eight Plates.) 49 



V. A Scientific Account of the Inner Harbor of Boston, with a Synopsis of the Gen- 

 eral Principles to be observed in the Improvement of Tidal Harbors. By Charles 

 Henry Davis, A. M., A. A. S., M. A. P. S., etc 93 



VI. Observations on a New Ring of the Planet Saturn. By W. C. Bond. (With a 



Plate.) Ill 



VII. On the Rings of Saturn. By G. P. Bond 113 



VIII. A History of the Fishes of Massachusetts. Part II. By David Humphreys 



Storer, M. D., A. A. S. (With Eight Plates.) 122 



IX. The Tornado of August 22d, 1851, in Waltham, West Cambridge, and Medford, 



Middlesex County, Mass. By Henry L. Eustis, A. M. (With a Map.) . 169 



