740 



REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



M 



spleen and liver are free from parasites. On the other hand, my sec- 

 tions of the heart show great numbers of the kidney parasites all through 

 the walls of that organ. I counted thirty-three in a single thin section. 

 A hasty examination of the muscular tissue of the back showed none, 

 and the brain does not contain them. 



As matters are, I cannot doubt that these kidney parasites caused 

 the death of these fish. In my previous and first examination of these 

 fish I was misled by the fact that the first specimens from which sections 

 were obtained coutained relatively few of these parasites, while the 

 general appearance of the organs in other respects was closely like that 

 of the diseased herring from Lake Mendota. 



Of course, no practical conclusion can be drawn from this until we 

 know what these parasites are and where they came from, or in what 

 other host they continue their development ; and for this a general 

 study of the subject on the spot would be necessary. 



Charlestown, N. H., April 30, 1887. 



Table I. 



-Record of trout eggs taken at McCloud River Station during the season of 

 1885-'86. 



Date. 



1885. 



December 20. . . 



.1886. 



January 4 



January 13 



January 18 



January 23 



January 21 



February 1 



February 9 



February 14 



Females. 



Eggs. 



12, 500 



200 



000 

 100 

 300 

 inn 

 150 

 050 



UK) 



Date. 



March 6 — 

 March 16... 



April 3 



April 5. 



April 12.... 

 April 20.... 

 April 27.... 



May 5 



May 10 



Total 



Females. 



Eggs. 



20, 200 

 11,500 

 10, 050 

 20, 150 



5,025 

 10, 000 

 10, 000 

 13, 000 



8,000 



221, 425 



Table II.- 



-Record of trout eggs taken at McCloud River Station during the season of 



1886-'87. 



Date. 



1880. 

 December 26. . 



1887. 



January 4 



January 12 



January 14 



January 26 



January 27. ... 

 January 31.... 

 February 3 . . . 

 February 12... 

 February 15... 



Females. 



Eggs. 



500 

 200 

 000 

 000 

 200 

 000 

 300 

 000 

 000 



Date. 



February 17 

 February 23 

 February 25 



March 3 



March 9 



March 20... 

 March 29... 



April 5 



Aprils 



April 11*... 



Total . 



Females. 



Eggs. 



28, 000 

 10, 000 

 10, 000 

 20, 500 



5,200 

 20, 000 

 12, 000 

 10, 000 

 24, 000 



2,000 



268, 400 



At, this date there are 53 more fish which are expected to spawn. 



