XVI Systematic Arrangement. 
CLASS PISCES— Continued. Paiie. 
SUBCLASS TELEOSTOMI— Continued. 
Order Plectospondyli —Conti n ued . 
Suborder Evestognathi— Continued. 
Family Ci/jtnnidee— Continued. 
Genus Orthodon, Girard 206 
microleiiidotns (Ayres) 207 
Genus Oxygeneum, Forbes 207 
pulverulentuni, Forbes 207 
Genus Acrocbeilus. Agassiz 207 
alutaeeus, Agas.siz &. Pickering 208 
Genus Lavinia, Girard 208 
exilicauda, Baird A Girard 209 
Genus Chrosomus, Rafinesque 209 
eiythrogaster, Rafinesque 209 
eos (Cope) 210 
dakotensis, Evermann &. Cox 210 
oreas, Cope 211 
Genus Algansea, Girard 211 
tincella (Cuvier <t Valenciennes) 211 
lacustris, Steindachner 3140 
tarascorum, Steindachner 2796 
dugesi. Bean 211 
sallad (Giinther) 212 
Genus Hybognatbus, Agassiz...". 212 
Subgenus Hybognathus 213 
nucbalis, Agassiz 213 
argyritis, Girard 214 
hayi, Jordan 214 
Subgenus Dionda, Girard 214 
serena (Girard) 214 
episcopa (Girard) 214 
nubila (Forbes) 215 
amara (Girard) 215 
melanops (Girard) 216 
plumbea (Girard) 216 
Genus Piniephales, Rafinesque 216 
promelas, Rafinesque 217 
niaculosns (Girard) 217 
confertus (Girard) 217 
notatus (Rafinesque) 218 
Genus Mylopbarodon, Ayres 218 
conocephalus (Baird A Girard) 219 
Genus Mylocbeilus, Agassiz 219 
eaurinus (Richardson) 219 
Genus Stypoilon, Garman 220 
slgnifer, Garman 220 
Genus Semotilns, Rafinesque 220 
Subgenus Leucosomus. Heckel 221 
corporalis (Mitcbill) 221 
Subgenns Semotilus 222 
atromaciilatus (Mitchell) 222 
thoreauiauiis (Jordan) 223 
Genus Poeonichthys, Girard 223 
macrolepidotiiH (.\yres) 223 
Genus Ptychoeheiliis, Agassiz 224 
oregonensis (Richardson) 224 
grandis (.\yres) 225 ; 2796 
lucius. Girard 225 
