lfl.^G.l PROCEEDINGS OF UNITED .STATES NATIONAL ^flTSEUM. i 



bead, its inner margin witli short sharp teeth on (he, l):isiil half, its 

 outer margin nearly entire, with a few points near its tii). Adipose tin 

 rather high, its edge coutinnous with that of the caudal, witii no evident 

 notch between. Anal fin ratlier long and high, its base -J!, in body, its 

 longest ray If in head. 



Color uniform dark brown, without bars or markings, the body and 

 fins being densely covered with dark points, visible under the lens ; fins 

 all dusky, with narrow pale margins. 



This species is nearest to N. leptacanthus among those now known. 

 It differs from that species in the stronger spines and in tiu^. more 

 robust form. 



It was also obtained by us in the Washita and Saline Ilivers. The 

 best specimens obtained (3G461, U. S. N. M.) were from the Saline, at 

 Benton. 



5. Noturus flavus Rafiuesqiie. 

 (3. Laptops olivaris Rafineaqne. 

 Arkansas Kiver. 



7. Ammrus natalis Le Sueur. 



8. Ictaluiiis punctatus Rafinesqne. 



Very common, especially in the Arkansas. 



9. Ictiobus velifer Rafinesquc. 



10. Catostonius nigricans Lo Sueur. 



11. Moxostoma macrolepidotum Le Sueur. 



12. Placopharynx carinatiis Cope. 



13. Campostoma anoinalmn Rafiuesque. 



14. Hybognathus nuclialis Girard. 



15. Pimephales notatus Rafinesque. 

 Scarce. 



16. Cliola vigilax Baird & Girard. 

 Scarce. 



17. Notropis scabriceps Cope. 



Poteau River; rather scarce. Specimens apparently identical with 

 those taken in White Eiver, except that they are much more silvery than 

 the latter and almost destitute of dark points on the scales except at 

 base of caudal. 



18. Notropis illecebrosus Girard. 



Identical with Girard's types. Coloration very pale and silvery. 



19. Notropis dilectus Girard. 



Very abundant. 



20. Notropis iimbratilis Girard. 



is'ot rare; originally described from tributaries of the Poteau. 



