LIST OF ILLUSTRATIONS. 
Plates 1 to 11.-—Mr. W. K. Brooks on Lucifer: a Study in Morphology. 
Plates 12 to 18.—Mr. W. K. Parker on the Structure and Development of the Skull 
in Sturgeons. 
Plates 19 and 20 . —Mr. G. LI. Darwin on the Stresses due to the Weight of 
Continents and Mountains. 
