202 REPOET OF COxMMISSIONi;R OF FISH AND FISHERIES. 



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

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

 the water is very extraordinary. It will run for sis months without depositing sedi- 

 ment or growmg fungus. Water-cress and other Avater-plants grow in this water with 

 a rankness and luxuriance that is wonderful. Although the water must contain alkali, 

 it is vastly superior to any water that I have 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 ^s confined 

 at present to the hatching and rearing 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 superintendent of fisheries, Mr. A. P. Rockwood. 



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

 City. Hare. Female. August 26, 1872. (See drawing.) This varietj^ 

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

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

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

 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 2G, 1872. See No. 

 12. (See drawing.) 



No. 14. Pharyngeal teeth of " Sacramento pike." August 20, 1872. 



No. 15. Yiscera of No. 12. 



No. 10. Yiscera of No. l.j. 



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

 deep and thin. Head, tail, back, and fins bjack. Very black all over 

 when dry, except on belly. 



Dmensions. 



, Inches. 



From snout to fork in tail 18 



From snout to end of tail 19 



Girtli 8^ 



Head 4 



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

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



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

 the measurement taken just in front of the dorsal fin. 



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

 but they were A'ery large and full, with milt flowing copiously from them. 



No. 19. Sahnon grilse. Male. Body deei) 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.) 



