iv. Contents. 



Observations on the Polytrichacenc : with a notice of some ppccios occur- 

 ring in Essex County, Massachusetts. Dy JOHN LEWIS RUSSELL. 11? 



The Danvers Bowlder or Ship Rock. 120 



Minute PoJythalamous Shells occurring on the coast of Maine, New 



England. By JOHN LEWIS RUSSELL, ..... 121 



Notice of several fishes of raro occurrence. By II. WHEAT-LAND. 122 



Further notice of raro plants. By JOHN LEWIS RUSSELL. 125 



Conspectus of Shells found in Essex County, &c, 126 



Index, 134 



