202 EEPORT OF COMMISSIONI^i OF FISH AND FISHERIES. 



No. 11. The Salt Lake City trout-ponds are fed by springs and spring streams, which 

 contain the clearest and purest water that I have ever seen. Indeed, in these respects, 

 the water is very extraordinary. It Avill run for six months without depositing sedi- 

 ment or growing fungus. Water-cress and otlier water-plants grow in this water with 

 a rankness and Inxiu-iauce tliat is wonderful. Although the Avater must contain alkali, 

 it is vastly superior to any water that I liave ever seen on the Atlantic or Pacific slopes 

 for breeding and rearing trout. 



There is a fine lot of the native Utah trout at this establishment, which is confined 

 at present to the hatching and rearijig of the native varieties, viz, Utah mountain- 

 trout and Utah Lake trout. The place is carried by the city government, and is in 

 charge of the Mormon suxierinteudent of fisheries, Mr. A. P. Rockwood. 



No. 12. Sacramento Eiver trout. Sacramento Eiver at Sacramento 

 City. Rare. Female. Angnst 2G, 1872. (See drawing.) This variety 

 sometimes attains a large size, being- occasionally as large as the smaller 

 salmon. They are called salmon by some. Mr. S. R. Jones, of the Sac- 

 ramento fish-market, and a good authority, thinks that they are moiint- 

 ain-trout which have accidentally dropped down the river to this point. 

 They are caught here chiefly in the fall, and when the winter rains come 

 on they disappear again. 



No. 13. Sacramento Eiver trout. Male. August 26, 1872. See No. 

 12. (See drawing.) 



No. 11. Pharyngeal teeth of '' Sacramento pike.*' August 20, 1872. 



No. 15. Viscera of No. 12. 



No. 16. Viscera of No. 13. 



No. 17. Salmon grilse. September 3, 1872. McCloud River. Very 

 deei) and thin. Head, tail, back, and fins black. Very black all over 

 when dry, except on belly. 



Dimensions. 



Inches. 



From snout to fork in tail 18 



From snout to end of tail 19 



Girth o ^ 



Head 4 



Abundant. Scales absorbed into skin, and skin very slimy. Flesh soft, 

 but eatable. Many parasites in gills. (See drawing.) (See note.) 



No. 17. The word "girth" in the catalogue, when used without explanation, means 

 the measurement taken just in front of the dorsal tin. 



No. 18. Viscera of No. 17. Testes, or milt glands, were not saved ; 

 but they were very large and full, with milt flowing copiously from them. 



No. 19. Salmon grilse. JMale. Body deep and thin. McCloud Eiver, 

 California, September 5, 1872. Very black and slimy. Gills full of 

 parasites. Looked foul. Greenish yellow sores in flesh, under the skin. 

 Weight, 4 pounds. (See drawing.) 



