30 



^ <-• 



/ 



T H E 



AMERICAN 



JOURNAL OF SCIENCE. 



EDITORS 



JAMES D. and EDWARD S. DANA. 



ASSOCIATE EDITORS 



Professors JOSlAH P. COOKE, GEORGE L. GOODALE 

 and JOHN TROWBRIDGE, of Cambridge, 



Professors H. A. NEWTON and A. E. VERRILL, of 

 New Haven, 



Professor GEORGE F. BARKER, of Philadelphia. 



THIRD SERIES. 



VOL. XXXV. -[WHOLE NUMBER, UXXXV.J 

 Nos. 205—210. 



JAKTTAKY TO JUNE, 1888 



WITH VII PLATES. 



s 



NEW HAVEN CONN.: J. D. & E. S. DANA. 

 1888. 



