428 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



65. — Mylophaeodon Ayres. 1855. 



373. Mylopharodon conocepludus (Ayres) Grd. Califoraia. 



66.^*TiAEOGA Girard. 1856. 



374. Tiaroga cobitis Grd. Eio Gila. 



67.— Graodus Giinther. 1868. 



375. Graodus nigrotceniatus Gthr. Mexico. 



68. — Lepidomeda Cope. 1874. 



376. Lepidomeda vittata Cope. Colorado Elver, Arizona. 



377. Lepidomeda jarrovii Cope. Colorado Eiver, Arizona. 



69.— Meda Girard. 1856. 



378. Medafidgida Girard. Eio Gila. 



70. — Plagopterus Cope. 1874. 



379. Plagopterus argentissimus Cope. San Luis Yalley, Western Colo- 



rado. 



DOEYSOMATID^. 

 71. — DoRYSOMA Eafinesque. 1820. Gizzard Shads. 



380. Dorysoma eepedianum heterurum (Eaf.) Jor. Mississippi Yalley — 



escaped into the lakes. 



CLUPEID^. 



72.— Alosa Cuvier. 1829. Shads. 



381. Alosa sapidissima (Wilson) Storer. Coast — ascending most streams. 



73. — PoMOLOBUS Eafinesque. 1819. Alewives. 

 § Meletta Valenciennes, 1847. 



382. Pomolohus pseudoharenguslacustris J OTdaji. Lake Ontario and lakes 



of Western New York. . 



§ Pomolohusi 



383. Pomolohus chrysochloris Eaf. Mississippi Valley — escaped into the 



lakes. 



* I have at present little faith in the validity of the genus Tiaroga. It looks like a 

 Cliola in which one of the teeth in the main row has been lost. 



