Scales of Beetles and Fishes. 



"Frontispiece. 



1. Weevil, natural size. 2. Scales of Weevil, magnified 100 diameters. 



3. Scales of Green Weevil, magnified 150 diameters. 4. Scale of Perch, magnified 4 diameters. 



5. Lines on Perch's scale, magnified 100 diameters. 6. Scale of Sole, magnified 9 diameters. 



7. Piece of Eel's Skin, magnified 4 diameters. 

 8. Upper and under layers of Eel-skin, and Eel scales. 9. Scale of Eel, magnified 50 diameters. 



