ee ee ee 
THE ae 
AMERICAN JOURNAL 
SCIENCE AND ARTS. 
EDITORS, 
JAMES D. DANA, B. SILLIMAN, ann E. 8. DANA. 
ASSOCIATE EDITORS, 
Prorrssors ASA GRAY, WOLCOTT GIBBS anp 
J. P. COOKE, Jr., or CamBriner, 
Prorrssors H. A. NEWTON, 8. W. JOHNSON, G. J. BRUSH 
anv A. E. VERRILL, or New Haven, 
Prorressor GEORGE F. BARKER, or PuiLapELpHtia. 
THIRD SERIES. 
VOL. XV.—[WHOLE NUMBER, CXV.] 
- Nos. 85—90. 
JANUARY TO JUNE, 1878. 
WITH TWO PLATES. 
NEW HAVEN: EDITORS. 
1878. 
MISSOURI BOTANICAL 
AROEN LIBRARY 
