jfe. D. Walcott, 



J. S. Geol. Survey. 



Jfaa^,Wmm^ 



[i 



JUNE, 1896. 



Established by BENJAMIN SILLIMAN in 1818. 



THE 



AMERICAN 



JOURNAL OF SCIENCE 



Editor: EDWARD S. DANA. 



ASSOCIATE EDITOES 



Professors GEO. L. GOODALE, JOHN TROWBRIDGE, 

 H. P. BOWDITCH and W. G. FARLOW, of Cambridge, 



Professors H. A. NEWTON, O. C. MARSH, A. E. YERRILL 

 and H. S. WILLIAMS, of New Hayen, 



Professor GEORGE F. BARKER, of Philadelphia, 

 Professor H. A. ROWLAND, of Baltimore, 

 Mr. J. S. DILLER, of Washington. 



FOURTH SERIES. 



YOL. I— [WHOLE NUMBER, CLL] 



No. 6.— JUNE, 1896. 



PLATES X-XIII. 



NEW HAYEN, CONNECTICUT. 



1896. 



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