416 BULLETIN UNITED STATES GEOLOGICAL SUKVEY. 



60. Carpiodes hison Ag. Mississippi Valley. 



61. Carpiodes tumidus B. & G. Eio Grande Eegion. {C.grayi Cope.) 



62. Carpiodes tJiompsoni Ag. Great Lake Eegion. 



63. Carpiodes cyprinus (Uq S.) Ag. New York to Missouri Eegion. 



{C. damalis Grd.) 



64. Carpiodes velifer cEaf.) Ag. Ohio Valley, etc. 



65. Carpiodes eutisanserinus Cope. Lake Erie to Tennessee. 

 QQ. Carpiodes difformis Cope. Ohio Eiver. 



18.— Cycleptus Eafinesque. 1819. Black Horse. 



67. Cijcleptus elongatus (Le S.) Ag. Mississippi Valley. 



19. — Pantosteus Cope. 1876. Hard-headed Suckers. 



68. Pantosteus virescens Cope. Arkansas Eiver. 



69. Pantosteus platyrhynchus Cope. Utah. 



70. Pantosteus generosus (Grd.) Jor. New Mexico to Southern Cali- 



fornia. (P. jarrovii Cope.) 



71. Pantosteus plebeius (B. & G.) Jor. Colorado Basin. (P. de'^Mnus 



and P. hardus Cope.) 



20. — Catostomus Le Sueur. 1817. Fine-scaled Suckers. 

 § Catostomus. 



72. Catostomus discoholus Cope. Colorado Basin ; Snake Eiver, Idaho. 



73. Catostomus tahoensis Gill & Jordan. Lake Tahoe, Nevada. 



74. Catostomus longirostris Le Sueur. Vermont to Puget's Sound; 



north to Alaska. ( C. hudsonius Le S., G. griseus Grd., C. lactarius 

 Grd., C. fosterianus Eich., C. aurora Ag., etc.) 



75. Catostomus latipinnis {Qvd.) GoT^Q. Platte Basin; Colorado Basin. 



(C guzmaniensis Grd.) 



§ Decadactylus Eaf. 



76. Catostomus occidentalis Ayres. Colorado to California. {C. her- 



nardini Grd.) 



77. Catostomus labiatus Ayres. Northe»rn California. 



78. Catostomus macrocMlus Grd. Columbia Eiver. 



79. Catostomus commersoni (Lacepede) Jordan. Maine to the Great 



Plains and south. {C. teres, communis, hostoniensis, sucMii, alti- 

 colus, trisignatus, chloropterus, etc., of authors.) 



80. Catostomus elarTcii B. & G. Gila Basin. 



81. Catostomus insignis B. & G. New Mexico; Arizona. 



§ Sypentelium Eafinesque. 1818. 



82. Catostomus nigricans Le S. New York to Minneso'^a and south. 



