LIST OF ILLUSTRATIONS. 
Plates 21 to 29. —Messrs. F. M. Balfour and W. N. Parker on the Structure and 
Development of Lepidosteus. 
Plates 30 to 38.— Mr. W. K. Paeker on the Development of the Skull in Lepidosteus 
osseus. 
Plates 39 to 47.-—Dr. J. W. Dawson on the Results of Recent Explorations of Erect 
Trees containing Animal Remains in the Coal-formation of Nova Scotia. 
Plate 48,*—Lord Rayleigh on the British Association Unit of Resistance in Absolute 
Measure. 
Plates 49 ; 50.—-Mr. W. Bevan Lewis on the Comparative Structure of the Brain 
in Rodents. 
