CONTENTS. 
XT 
Order IV, Physostomi or Malacopteri—Continued. 
Leucosomus-- 
1. Leucosomus dissimilis. 
2. Leucosomus pallidus_ 
3. Leucosomus incrassatus.. - 
4. Leucosomus macrocephalus 
Ceraticlithys- 
Nocomis ...... 
Nocomis nebrascensis ..._ 
Hybopsis -_....... 
Tribe of Alburni- 
Exoglossum__.... 
Exoglossum mirabile- 
Cliola.—. 
1. Cliola vigilax.. 
2. Cliola velox___ 
3. Cliola vivax____ 
Alburnellus__ 
1. .Alburnellus dilectus ...... 
2. Alburnellus umbratilis_ 
Alburnops_ 
1. Alburnops blennius_ 
2. Alburnops shumardi .. 
3. Alburnops illecebrosus_ 
Plargyrus _ 
Plargyrus bowmani_ 
Cyprinella_ 
1. Cyprinella bubalina_ 
2. Cyprinella umbrosa_ 
3. Cyprinella gunnisoni_ 
4. Cyprinella bcckwithi_ 
5. Cyprinella suavis ..._ 
6. Cyprinella lepida__ 
7. Cyprinella notata_ 
8. Cyprinella whipplii_ 
9. Cyprinella lugubris_ 
10. Cyprinella ludibunda. 
Moniana.... 
1. Moniana lutrensis ... 
2. Moniana leonina___ 
3. Moniana deliciosa._ 
4. Moniana laetabilis_ 
5. Moniana pulchella_ 
6. Moniana frigida_ 
7. Moniana tristis._ 
Richardsonius_ 
1. Richardsonius balteatus.... 
2. Richardsonius lateralis_ 
Luxilus_ 
1. Luxilus occidentalis_ 
2. Luxilus seco_ 
3. Luxilus lucidus __ 
Semotilus__ 
Semotilus speciosus. 
Hudsonius... 
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