Systematic Arrangement. xv 
CLASS PISCES — Continued. Page. 
SPBCLASS TELEOSTOMI-Continned. 
Order Plectospondyli— C ontinued. 
Suborder Eventognathi— C ontinued. 
Family Catostomidce — Continued. 
Genus Catostomus, Le Sueur— Continued. 
Snbgenus Decactylua, Eaflnesque— Continued. 
gila, Kirsch 180 
insignia, Baird A Girard 180 
Subgenus Hj*pentelium, Rafinesque 181 
nigricans, Le Sueur 181 
rhotboecus, Thoburn 181 
Genus Deltistes, Seale 2794 
luxatus (Cope) 183; 2794 
Genus Chasmistes 182 
fecundus (Cope Sc Parrow) 180; 2794 
liorus, Jordan 183 
cujus, Cope 183 
brevirostris, Cope 183 
stomias, Gilbert 2794 
copei, Evermann Sc Sleek 2795 
Genus Xyraucben, Eigenmann Sc Kirscb 184 
cypbo (Lockington) 184 
uncompabgre, Jordan & Evermann 184 
Genus Erimyzon, Jordan 185 
sucetta (Lacepede) 185 
oblongus (Mitchill) 186 
Genus Sliuytrejua, Jordan 186 
melanops (Rafinesque) 187 
Genus Sloxostoma, Rafinesque 187 
papillosum (Cope) 189 
anisurum (Rafinesque) 190 
collapsum (Cope) 190 
bucco (Cope) 190 
pidiense (Cope) 191 
coregonus (Cope) 191 
album (Cope) 191 
tbalassinum (Cope) 191 
congestum (Baird Sc Girard) 192 
austrinum, Bean 192 
aureolum (Le Sueur) 192 
robustum (Cope) 193 
macrolepidotum (Le Sueur) 193 
crassilabre (Cope) 194 
lesueuri (Richardson) 194 
breviceps (Cope) 166 
conns (Cope) 196 
pcecilurum (Jordan) 190 
rupiscartes, Jordan A Jenkins 196 
cervhmm (Cope) 197 
Genus Placopbar 3 'nx, Cope 197 
duquesnii (Le Sueur) 198 
Genus Lagocbila, Jordan Sc Brayton 198 
lacera, Jordan &. Brayton 199 
Family Gyprinidce 199 
Genus Campostoma, Agassiz 904 
ornatum, Girard 90o; 2<9i> 
anomaliim (Rafinesque) 905 
forraosulum, Giranl 906 
