BULLETIN OF THE UNITED STATES FISH COMMISSION. 275 



as usual, Uad the kiudness to lend his co-operation in this shipment, for 

 which we cannot show ourselves too grateful. 



CALiFOiiNiA SALMON. — " Several gifts, likewise very precious, have 

 been made to us by the German Fishery Association, which, on the 

 proposition of its eminent president, von Behr, has generously made 

 it possible for you to attempt the stocking of our waters with choice 

 species which are recommended either for the quality of their flesh or 

 the rapidity of their growth. Let us recall, moreover, that it is due to 

 the gifts previously made to our society by von Behr, that you have 

 been able to announce this year the complete acclimatization of the Cali- 

 fornia salmon {Sahno quinnat), in regard to which Messrs. Eathelot and 

 Clermont have given you interesting details. 



Fish-ways. — ''Knowing that the Society of Acclimatization interests 

 itself in all questions which relate to the restocking of rivers and to the 

 protection of migratory fish, the Minister of War ajii^ealed to your knowl- 

 edge of the subject, with a view to the construction of a fish-way for 

 salmon on the Dourduf Eiver at the dam belonging to the powder mill 

 of Pont-de-Buis, department of Finistere. The numerous documents 

 which you possess, from the Commission of Fisheries of the United 

 States and from other sources, relating to fish-ways for salmon, have 

 permitted you to inform the administration regarding the different 

 systems in use and the types which are most advantageous, considering 

 the cost of their establishment and maintenance as well as their utility. 



CKOSS-BREEDiNG.^"Mr. Seth Green, of Bochester, K Y., one of the 

 veterans of American fish-culture, has given you an account of his very 

 curious experiments in the cross-breeding of different species of salmon. 

 Such experiments should be attentively observed, both as a matter of 

 scientific interest and for the practical results which may be obtained." 

 [Bulletin, May, 1883, p. 71.] 



Lake trout. — Mr. des Vallieres, of Meaux, gave an account of the 

 results which he had obtained from the fertilized eggs of the great Euro- 

 l)ean lake trout, and of the Salmo namaycush : 



" The first of these shipments, which contained a small lot of impreg- 

 nated eggs, reached me in very satisfactory condition. These eggs pror 

 duced fry in the proportion of 95 per cent. The eggs of the Salmo namay- 

 cush, which were sent to me in great numbers, have been mostly spoiled 

 when they reached me. I estimate that 50 per cent of the eggs were 

 thrown away on their arrival; and during the period of hatching prob- 

 ably 15 per cent more died in the ^gg or perished at birth. I attribute 

 these numerous losses to the freezing which took place during the pas- 

 sage from America, and which has produced morbid effects more or less 

 active. Immediately after the absorption of their yelk-sacs, the fry of 

 these two species [S. namaycush and the great European lake trout] were 



