70 SALMONIA. [SECOND DAY. 



spawn approach nearer to each other ; but the charr 

 spawns in still and the trout in running water. In 

 general the trout are mature before the charr, yet I 

 have seen in the Leopoldstein See, in Styria, a female 

 charr, of which the eggs were almost fully developed 

 as early as June : the fisherman of the Griindtl See 

 said, that these peculiar fish were very rare, and that 

 he caught only one in about 500 charr. It is not, I 

 think, impossible, that it may be an umbla, a fish that 

 might be expected to be found in that deep, cold, 

 Alpine lake, a peculiar species and not a mixed variety. 

 It is a fertile and very curious subject for new 

 experiments, that of crossing the breeds of fishes, and 

 offers a very interesting and untouched field of 

 investigation, which I hope will soon be taken up by 

 some enlightened country gentleman, who in this 

 way might make not only curious but useful dis- 

 coveries. 



POlET. So much science would be required to 

 make these experiments with success, and there would 

 be so many difficulties in the way of preserving fishes 

 at the time they are proper for reproduction, that 

 I fear very few country gentlemen would be capable 

 of prosecuting the inquiry. 



HAL. The science required for this object is easily 

 attained, and the difficulties are quite imaginary. 

 The impregnation of the ova of fishes is performed out 



