THE SALMON FAMILY. 327 



snow-storm in July, when it was so bitterly cold that the 

 rings were frozen to the rod. 



Other deformities are not very uncommon amongst Trout. 

 The Hog- backed Trout of Plinlimmon, which is occasion- 

 ally taken in Bagail Lynn, Shepherd^s-pool, is not altogether 

 unlike the Perch in form ; and in the river Towey, Car- 

 marthenshirCj a fine fish of the Salmon or Trout species 

 was caught, with the net, which had two heads and two 

 tails — the heads being joined on to one neck, and the tails 

 meeting about the centre. The fish was preserved for 

 some time in a small pool at Llangattock, for the inspection 

 of visitors. 



The usual spawning-time of Trout is in the latter end of 

 October or November, and thence up to the beginning of 

 February (the operation, however, in each particular fish 

 continuing only about eight days) ; and at this period the 

 under jaw in the old males exhibits in a modified degree 

 the elongation and upward curving characteristic of the 

 male Salmon at the same time. An example of this is 

 shown in the figure of the Thames Trout at p. 320, in 

 which, from the very considerable age of the fish, the cur- 

 vature would probably be to a certain extent permanent, 

 but increasing at the spawning-season. In a less aged 

 specimen the curvature would not be so marked. 



From the experiments of Dr. Davy, elsewhere com- 

 mented upon, it appears probable that at least a propor- 

 tion of Trout, like some Salmon, spawn only in alternate 



