LIST OF PLATES. 
To face page 
I, Bille on History of the Danes in America . 48 
II, III, Simons on Railroad Pools .... 66 
IV, Lueders on G-raminese . . . . .Ill 
V-XIV, Marsh on Crustacea ..... 208 
t 
XV-XLII, Birge on Crustacea .... 286-413 
XLIII-L, Slichter on Harmonic Curves 
448 
