lis U. S. BUREAU OF FISHERIES 



835. Richardsonius siuslawi (Evermann and Meek). 



Streams of western Oregon. 



Leuciscus siuslawi Evermann and Meek, Bull. U. S. Fish Com., XVIT, 

 1S97 (1898), 72. Siuslaw River, Mapleton, Oreg. 



836. Richardsonius lateralis Girard. 



Streams of Washington and Montana, a doubtful species, nominally 

 distinguished by the smaller numl)er of anal rays. 



Richardsonius lateralis Girard, Proc. Acad. Nat. Sci. Phila., VIII, 

 1856, 202, Fort Steilacoom, Wash. 



Leuciscus gilli p]vermann. Bull., U. S. Fish Com., XI, 1891, 44, Browns 

 Gulch Creek, Silver Bow, Mont. 



837. Richardsonius balteatus (Richardson). Red-sided bream. 



Columbia and Eraser Rivers, and streams about Puget Sound. 

 Cyprinus (Abramis) balteatus Richardson, Fauna Bor.-Amer., Ill, 

 1S36, 301, Columbia River. 



838. Richardsonius thermophilus Evermann and Cockerell. 



Warm Springs, Silver Creek, and Silvies River, Oreg. 



Richardsonius thermophilus Evermann and Cockerell, Proc. Biol. Soc, 



Wash., XXII, December 8, 1909, 185, Warm Springs, Harney Co., 



Oreg. 



Genus 310. CLARKINA Jordan and Evermann. 



Cyprinus {Leuriscu.s) caurinus Richardson is an ally of the genus 

 Richardsonius, differing in the short anal fin of 9 rays only. The 

 body is elongate and the scales (86) very small, well imbricated, 

 differing from the type of Tigoma. 



Clarkina Jordan and Evermann, Proc. Calif. Acad. Sci., 4th ser., XVI, 

 1927 (April 27), 502 {Cyprinus caurinus Richardson). 



839. Clarkina caurina (Richardson). 



Cyprinus {Leuciscus) caurinus Richardson, Fauna Bor.-Amer., Ill, 



1836, 304, Columbia River at Fort Vancouver. 

 Leuciscus caurinus Snyder, Bull. U. S. Fish Com., XXVII, 1907, 173; 



not Mylocheilus caurinus Agassiz; Willamette River near Corvallis, 



Oreg. 



Genus 311. CHEONDA Girard. 



Cheonda Girard, Proc. Acad. Nat. Sci. Phila., VIII, 1856, 207 (C. 

 (•ooj>cri (jirard); scales moderate; anal ra\'s 8 to 11, usually 9. 



840. Cheonda cooperi Girard. 



Lower Columbia River Basin. 



Cheonda cooperi Girard, Proc. Acad. Nat. Sci. Phila., VIII, 1856, 207, 

 Columbia River, Fort Vancouver, Wash. 



841. Cheonda microdon (Snyder). 



Richardsonius microdon Snyder, Bull. U. S. Bur. Fish., XXXV, 1915-16 

 (1918), 58; scales 55; anal rays 8 or 9. 



842. Cheonda egregia (Girard). 



Nevada to northern California; known from the Humboldt, Truckee, 

 and Sacramento-San Joacjuin Basins and Napa Valley, Calif. 



Tigoma egregia Girard, Pac. R. R. Surv., X, 1858, 291, locality Hum- 

 boldt River at Imlav, Nev. 



Gila ardesiaca Cope, Wheeler Surv., Zool., V, 1875, 660, PI. XXX, 

 figs. 1, la, localitv unknown, probablv Nevada. 



Squalius galtix Cope, Proc. Acad. Nat. Sci. Phila., XXXV, 1883, 148, 

 Pyramid Lake, Nev. 



Phoxinus clevelandi C. H. and R. S. Eigenmann, West Amer. Scientist, 

 1889, 149, ^tna Springs, Napa County, Calif, (locality probably 

 erroneous) . 



843. Cheonda evermanni (Juday). 



South Platte basin. 



Leuciscus evermanni Judav, Bull. U. S. Bur. Fish., XXIV, 1904 (1905), 



226, with plate, Boulder Creek, Boulder, Colo.; A. 8; scales 47; teeth 



2, 5-5, 1. 



