28 THE AMERICAN NATURALIST. [Vor. XXXV. 
PLATE I 
Fic. 1. Case I. Skiagraph taken with the frog’s left side bearing the entire 
supernumerary leg closer to the plate. 
. Case III. Ventral side closer to the plate, and legs so arranged as 
to be as much as possible in a transverse plane to the direction of the rays. 
Fic. 3. Hind legs of Case II arranged to show the bony elements of the 
supernumerary leg. 
IG. 4. Case II. Dorsal side of pelvis closest to the plate. Anterior por- 
tion of the body projected far above the plate. 
Fic. 5. Case I. Back closer to plate. Plate and frog were inclined to the 
course of the rays, so that image of the supernumerary leg would fall anterior 
to the normal legs. 
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