i86 



EVOLUTION AND DISEASE. 



degrees may be met with, from a broad web to others in 

 which the rachis of the tail feathers is clean from the first. 



JG. 98. The tail of the so-called Tailless Trout of Islay. 



FIG. 99. Tail of a normal Trout for comparison. (.After 

 Traquair.) 



The second case is furnished by the so-called tailless 

 trout of Islay. Professor Traquair has published an 



