Tins volutnc completes the octavo series of the " Journal." The 

 second series will ai)pear in (juarto form, under the title : — " Memoirs 

 read before the Boston Society of Natural History." 



Publishing Committee. 



CONTENTS. 



PAGE 



Akt. I. A supplement to the " Terrestrial Mollusks of the 



United States, &c." By W. G. Binxey . . 1 



Art. II. Observations upon the Geology and Palajontology of 

 Burlington, Iowa, and its vicinity. By Charles A. 

 White 209 



Art. III. On the Hymenoptera of the genus AUantus in the 



United States. By Edward Norton . . . 236 



Art. IV^. Descriptions of new species of Crinoidea from the 

 Carboniferous Rocks of the Mississippi Valley. By 

 James Hall 261 



Art. V. Notes on 'new species of Microscopical Organisms, 

 chiefly from the Para River, South America. By 

 LoRixG W. Bailey 329 



Art. VI. Contributions to the Comparative Myology of the 



Chimpanzee. By Burt G. Wilder . . . 352 



Art. VII. On alternate generation in Annelids and the embry- 

 ology of Autolytus cornutus. By A. Agassiz . 384 



Art. VIII. Materials for a monograph of the North American 

 Orthoptera, including a Catalogue of the known New 

 England species. By Samuel H. Scudder . 409 



Art. IX. Observations on the summit structure of Pentremites, 

 the structure and arrangement of certain parts of 

 Crinoids, and Descriptions of new species from the 

 Carboniferous Rocks at Burlington, Iowa. By 

 Charles A. White 481 



Art. X. Descriptions of the Fossil Plants collected by Mi-. 

 George Gibbs, Geologist to the United States North- 

 west Boundary Commission, under Mr. Archibald 

 Campbell, United States Commissioner. By Dr. J. 

 S. Newberry oOG 



