CONTENTS OF VOL. IV. NO. II. 



Page. 



Art. XII. Remarks upon Coral Formations in the Pacific ; with Sug- 

 gestions as to the Causes of their Absence in the same Parallels of 

 Latitude on the Coast of South America. By Joseph P. Couthouy. 137 



Art. XIII. — Descriptions of some of the Species of Naked, Air- 

 Breathing Mollusca, inhabiting the United States. By Amos Bin- 

 ney I^ 



Art. XIV. — Additional Descriptions of, and Observations on, the 

 Fishes of Massachusetts. By D. Humphreys Storer, M. D. . 175 



Art. XV. — An Inquiry into the Distinctive Characteristics of the Ab- 

 original Race of America. By Samuel George Morton, M. D. 190 



Art. XVI. — Descriptions and Figures of the Araneides of the United 

 States. By Nicholas Marcellus Hentz 223 



Art. XVII. — Descriptions of the Fishes of Lake Erie, the Ohio River 

 and their Tributaries. By Jared P. Kirtland, M. D. . . 231 



Art. XVIIL— Description ®f a Species of Helix, newly observed in 

 the United States. By Amos Binney. ..... 241 



Art, XIX.— Observations on the Habits of the Python Natalensis. 

 By Thomas S. Savage, M. D 242 



Art. XX.— Observations on the Characters and Habits of the Ocel- 

 lated Turkey, (Meleagris Ocdlata^ Cuv.j By Samuel Cabot, Jr. M. D. 246 



Art. XXI. — On the Existence of Siliceous ? Spicules in the Exterior 

 Rays of Actinia ; and Memoranda concerning the Siliceous Ani- 

 malcules of Boston. By G. W. Bailey 252 



Art. XXII.— Enumeration of the Fishes of Brookhaven, Long Island, 

 with Remarks upon the Species Observed. By William O. Ayres. 255 



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