PLATE 2 



EXPLANATION OF FIGURES 



The same series of trout specimens and photographed in exactly the same 

 order as ilhistratcd in plate 1. The individuals are here shown from as nearly as 

 possible the ventral aspects. Selecting any given specimen and comparing its 

 dorsal and ventral surfaces, as shown in plates 1 and 2, it is clearly seen that in 

 all cases the two components are equal in size and both are structurally normal. 

 These are not 'double monsters,' but perfect individuals. The condition of 

 doubleness is unusual, but not deformed or monstrous. The identical twins could 

 not be considered monsters, and they only differ in degree of doubleness from the 

 other members of the series. 



268 



