pr. Cyrus Adler, 



Librarian U. S. Nat. Museum. 



YOL. XIY. 



AUGUST, 1902. 



Established by BENJAMIN SILLIMAN in 1818. 

 THE 



AMERICAN 



JOURNAL OF SCIENCE. 



Editor: EDWARD S. DANA. 



ASSOCIATE EDITORS 



Professors GEO. L. GOODALE, JOHN TROWBRIDGE, 

 W. G. FARLOW AND WM.M. DAVIS, of Cambridge, 



Professors A. E. VERRILL, HENRY S. WILLIAMS and 



L. A^ PIRSSOX, OF New Havex, 



Professor GEORGE F. BARKER, of Philadelphia, 



Professor JOSEPH S. AMES, of Baltimore, 



Mr. J. S. DILLER, of Washington. 



FOURTH SERIES. 



YOL. XIY— [WHOLE NUMBER, CLXIY.] 



No. 80.— AUGUST, 1902. 



\\'ITH PLATE IV. 



NEW HAVEN, CONNECTICUT. 



1902 



THE TUTTLE, MOREHOUSE & TAYLOR CO., PRINTERS, 125 TEMPLE STREET. 



Published monthly. Six dollars per year, in advance. $6.40 to countries in the 

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