168 PRESENCE OF SALMON-FRY IN RIVERS. 



It may be necessary to mention here, though in 

 doing so, I i^artly repeat myself, that spawning 



with transverse bars, alleged by Mr. Shaw to be twelve 

 months old], which is the pink of the river Hodder, al- 

 luded to by Mr. Yarrell." Now, if ova deposited and im- 

 pregnated in the middle of September be hatched in ninety 

 days, the average time at this season of the year, as stated by 

 Mr, Young, they will be about four and a half months old in 

 the following May, and consequently can neither be JMr. 

 Shaw's parr " recently hatched," nor his twelve months old 

 specimen, nor Mr. Yarrell's " pink." Mr, Young says some 

 late spawners deposit their ova in March. These ova will be 

 hatched by the following 1st of June at the latest, the water 

 being at high temperature, generally speaking in April and 

 May. The fry produced by these ova will be only eleven 

 months old the following May. We will now take ova de- 

 posited and impregnated on the 1st December, and allow 

 them the longest period, viz, 140 days, for incubation. They 

 will be fish-foetus about the middle of April, and of course, 

 twelve months old at the same period of the following year. 

 Now take the fry of ova deposited in the early part of No- 

 vember and hatched in the middle of March, they will be 

 twelve months old in the corresponding period of the 

 following year, and two and a half months or more in the 

 May of the year in which it is hatched. Calculate in like 

 manner the produce of ova deposited in the months of Ja- 

 nuary and February, and you will find that you will have 

 embryo fish, no more than a day or so old, in the middle of 

 April and the beginning of May each succeeding year, 

 which can neither be Mr. Shaw's " parr," nor Mr. Yarrell's 

 "pink." Mr. Young states that the "throng" time of 

 spawning is between the middle of November and the mid- 

 dle of December, The " throng " time of the migration of 



