FISHES OF STREAMS FLOWIKG INTO SAN FKANCISCO BAY. 337 



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 cataphr actus (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 Cottoj)sis gulosus ^ of Girard. They 

 have sometimes considered the Sacramento form as identical with C. asper and have 

 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 wdth 

 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. osptr 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 1-1 rays. 



As a result of its having been confused with C. asper, C. gulosus was lately rede- 

 scribed from the Sacramento Basin under the name Cottus shastac. 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 ia 

 probably common to all of them. 



Specimens have been observed in the following creeks: San Francisquito, Madera, 

 San Antonio, Guadalupe, Coyote, and Alameda. 



« Gottus asper, Richardson, Fauna Bor.-Anier., Fish., 295, 1836. 



b Cottopsis gulosus Girard, Proceedings Academy Natural Science Pliiladelphia, VII, 1854, 129. 

 c Coitus Shasta Jordan and Starks, Proceedings California Academj' of Science, VI, 1896, 224. 



F. C. 1904—22- 



