CONTENTS 



Eulogy on Hon. John Pickering, LL. D., President of the Academy. 

 By Daniel Appleton White. ..... 



Page 



I. Chloris Boreali-Americana : Illustrations of New, Rare, 

 or otherwise Interesting North American Plants, selected 

 chiefly from those recently brought into Cultivation at the 

 Botanic Garden of Harvard University, Cambridge. By 

 AsA Gray, M. D. Decade I. (With 10 Plates.) . 1 



II. Contributions to the Bryology and Hepaticology of North 

 America. By Wm. S. Sullivant, A. M. Part I. 

 (With 5 Plates.) . . • 57 



III. Occultations and Eclipses observed at Dorchester and Cam- 



bridge, Massachusetts, by Wm. Cranch Bond, Director of 

 the Observatory, Wm. C. Bond, Jr., and George P. 

 Bond 67 



IV. An Account of the Nebula in Andromeda. By George P. 



Bond, Assistant at the Cambridge Observatory. (With 



1 Plate.) 75 



V. Description of the Nebula about the Star 6 Orionis. By Wm. 

 Cranch Bond, Director of the Cambridge Observatory. 

 (With 1 Plate.) 87 



VI. Some Methods of Computing the Ratio of the Distances of a 

 Comet from the Earth. By George P. Bond, Assistant 

 at the Cambridge Observatory. ..... 97 



VII. An Attempt to discriminate and describe the Animals that made 

 the Fossil Footmarks of the United States, and especially of 

 New England. By Edward Hitchcock, D. D., LL. D., 

 President of Amherst College, etc. (With 24 Plates.) . 129 



VIII. On Platygonus compressus : a new Fossil Pachyderm. By 



John L. Le Conte, M. D. (With 4 Plates.) . . 257 



Appendix. — Report on the Discovery and Nomenclature of the Eighth 



Satellite of Saturn. By Edward Everett, LL. D. . 275 



