FISHES OF STREAMS FLOWING INTO SAN FRANCISCO BAY. 3837 
9. Agosia nubila carringtoni (Cope). 
Coyote, Arroyo Honda, and Isabel creeks. 
10. Salmo irideus Gibbons. 
San Francisquito, Madera, San Antonio, Stevens, Campbell, Guadalupe, Coyote, 
Arroyo Honda, Smith, and Isabel creeks. 
11. Gasterosteus cataphractus (Pallas). 
San Francisquito, Madera, San Antonio, Stevens, Guadalupe, and Coyote creeks. 
Often seen in brackish ponds and sloughs near the bay. 
12. Hysterocarpus traski Gibbons. 
Coyote and Alameda creeks. 
13. Cottus asper Richardson. 
Recent authors have identified the common Sacramento form which represents 
the Cottus asper @ of the Columbia River with the Cottopsis gulosus» of Girard. They 
have sometimes considered the Sacramento form as identical with C. asper and haye 
placed the name gulosus in the synonymy of the latter. At other times they have 
considered the species as a slightly differentiated form worthy of recognition in 
nomenclature, and have used the name gulosus to designate it. The former view 
concerning the species is probably correct. The association of the name gulosus with 
it, however, is without warrant. The latter belongs to a species easily distinguished 
from C. asper, differing notably in having a much shorter anal fin. There are usually 
fewer dorsal spines and rays, a more limited distribution of prickles, and an almost 
uniform absence of palatine teeth. In C. asper the dorsal has 8 to 10 spines and 19 
to 22 articulated rays, the anal 16 to 18 rays, while in C. gulosus the dorsal has 7 to 9 
spines, 17 to 18 rays, the anal 12 to 14 rays. 
Asa result of its having been confused with C. asper, C. gulosus was lately rede- 
scribed from the Sacramento Basin under the name Cottus shasta®, The types of 
the latter differ in no way from C. gulosus as described by Girard. 
In its distribution C. asper appears to be largely confined to the lower courses of 
the streams, being especially abundant near tide water, while C. gulosus is found 
farther up, where the water is clear and the current rapid. The latter species has 
not been found in any of the creeks tributary to San Francisco Bay. C. asper is 
probably common to all of them. 
Specimens have been observed in the following creeks: San Francisquito, Madera, 
San Antonio, Guadalupe, Coyote, and Alameda. 
a Cottus asper, Richardson, Fauna Bor.-Amer., Fish., 295, 1836. 
b Cottopsis guiosus Girard, Proceedings Academy Natural Science Philadelphia, VII, 1854, 129. 
¢e Cotius shasta Jordan and Starks, Proceedings California Academy of Science, VI, 1896, 224. 
F, C. 1904—22 
