140 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
10. Gasterosteus microcephalus Girard. Stickleback. .Said to he coiinuou ; not seen by ns. 
11. Archoplites interruptu.s (Girard). Perch. Poriiierly very comnion, but now becoming scarcer as- 
its spawning-grounds are devastated by the carp. An excellent food-fisb, vigorous and gamy, 
reacliing a weight of pounds. The destruction of this valuable fish is one of the most 
unfortunate results of the ill-advised introduction of the carp into California waters. 
12. Cottus gulosus (Girard). Occasionally taken; several specimens seen. The form described by 
Dr. Eigenmann under tlie name of Uranidea semiscahra ceiitropleiira, from Allen Springs, a 
tributary of Cache Creek, is apparently not distinct from Cottus gulosus. 
13. Hysterocarpus traski Gibbons. Virijtarous Perch. Common, reaching a length of 8 inches. It 
brings forth its young in May and June. The development of this singular fish could be 
studied here, and may yield interesting results. 
Besides these native tishes, the following- have been introduced from the streams 
of the Eastern States: 
14. Cyprinu.s carpio Liniueus. The Carp. Everywhere very common, burrowing into the mud among 
the tules or in shallow waters, thus keeping the shoal waters roily all the time. This 
species is regarded as worthless as food. It destroys the eggs of the Sacramento perch, and 
also devours the VnUisneria, or water celery, on which the cauvasback and other ducks feed. 
In California this species is a nuisance, without redeeming (pi.alities. 
15. Ameiurus iiebulosus Le Sueur. The Catfish. Extremely abundant and destructive to the spawn 
of other species. It is, however, a fair food-fish and much less objectionable than the carp. 
It is tlie best fish in the lake except the Sacramento \ierch and the trout. 
16. Ameiurus catus (Liniije us). The Fork-tailed Catfish. Occasionally taken with the preceding. 
17. Micrppterus dolomieu Lac4p6de. Black Bass. Introduced lately ; a very few specimens taken- 
