Chas. D. Walcott, 



U. S. Geol. Survey. 

 VOL. I. 



u. 



MARCH, 1896. 



Established by BENJAMIN SILLIMAN in 1818. 



T II E 



•AMERICAN 



JOURNAL OF SCIENCE 



Editor: EDWARD S. DANA 



ASSOCIATE EDITORS 



Professors GEO. L. GOODALE, JOHN TROWBRIDGE, 

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



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

 and H. S. WILLIAMS, of New Haven, 



Professor GEORGE F. BARKER, of Philadelphia, 

 Professor H. A. ROWLAND, of Baltimore, 

 Me. J. S. DILLER, of Washington. 



FOURTH SERIES. 



YOL. I— [WHOLE NUMBER, CLL] 

 No. 3.— MARCH, 1896. 



PLATES II-YII. 



NEW HA YEN, CONNECTICUT. 



1896. 



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