STORMONTFIELD EXPEEIMENT. 71 



in the head and longer in proportion than the 

 fry of the salar in the same stage. We had no 

 proper way of keeping them at the time, but they 

 lived for 40 days. It would be interesting, if 

 not advantageous, to the proprietors of the salmon 

 fishings to carry out this experiment, so as to 

 ascertain if such a fish would live and propagate 

 its kind. As M. Coste recommended, experi- 

 ments should also be made with the ova of the 

 salmo trutta, or sea-trout, and also with the ova 

 of the salmo eriox, if it were only for the pur- 

 pose of ascertaining by comparison if there is any 

 recognisable difference in the parr and smoult of 

 this fish and that of the salmo salar or salmon. 

 But we are afraid that the expense of the addi- 

 tional apparatus will deter the Tay proprietors 

 from prosecuting these researches, as hitherto 

 they have shown little inclination to proceed 

 further than they have already done. 



HATCHING OF 1858. 



The ova of this hatching, having had a very 

 favourable season, burst their covering on the 2d 

 of March there were hardly any addled eggs. 

 On the 17th of April the first smoults belonging 

 to the previous hatching made their appearance 



