CONTENTS. XI 



Page. 

 Order IV, Physostomi or Malacoptcri Continued. 



Leucosoraus 250 



1. Leucosomus dissimilis 250 



2. Leucosomus pallidus . 251 



3. Leucosomus incrassatus 252 



4. Leucosomus macrocephalus 252 



Ccratichthys - . 253 



Nocomis 254 



Nocomis nebrascensis 254 



Hybopsis - 255 



Tribe of Alburni 255 



Exoglossum . - 255 



Exoglossum mirabile . 256 



Cliola 256 



1. Cliola vigilax 257 



2. Cliola velox 258 



3. Cliola vivax.. ._ _ . 258 



Alburnellus 259 



1. Alburnellus dilectus 259 



2. Alburnellus umbratilis 260 



Alburnops 260 



1. Alburnops blcnnius _ _ 2 fit 



2. Alburnops shumardi 261 



3. Alburnops illecebrosus 262 



Plargyrus 263 



Plargyrus bowmani . 263 



Cyprinella 264 



1. Cyprinella bubalina 265 



2 . Cyprinella umbrosa 266 



3. Cyprinella gunnisoni 267 



4. Cyprinella bcckwithi , 267 



5. Cyprinella suavis 268 



6. Cyprinella lepida ...... 268 



7. Cyprinella notata 269 



8 . Cyprinella whipplii _. 270 



9. Cyprinella lugubris . 271 



10. Cyprinella ludibunda _. 271 



Moniana 272 



1. Moniana lutrensis - 272 



2. Moniana leonina 273 



3. Moniana deliciosa. 274 



4. Moniana laetabilis 275 



5. Moniana pulchella _....._ 275 



6. Moniana frigida ._ _ 276 



7. Moniana tristis 277 



Richardsonius 278 



1. Richardsonius balteatus ... . 278 



2. Richardsonius lateral is 279 



Luxilus 280 



1. Luxilus occidentalis.. 280 



2. Luxilus seco 281 



3. Luxilus lucidus 282 



Semotilus 283 



Semotilus speciosus 283 



Hudsonius.. 284 



