6 FISHES OF AKKA?TSAS KlVEn BASIN. 



The following" speciraiMis of this type are iu the National Museum: 



30240. Spring River (Xeosho), Carthage, Mo. 



30275. James Fork of White River, Marshliekl, Mo. 



30399. Poteau River, near Hackett City, Ark. 



30410. Washita River, Arkadelphia, Ark. 



30447. Saline River, Benton, Ark. 



In other respects it is not materially different from the typical J 

 zonalc. 

 29. Uranidea richardsoni Agassiz. 



Common, especially abont springs in cool water. 



B. — TRIEUTATilES OF ARKANSAS lUVER IN THE VICINITY OF FOR 



SMITH. 



Onr collections in this region were made in the Poteau River at Shi 1 

 Pord, Indian Territory, some distance west of the village of Hacke 

 City; iu the James Pork of the Poteau, a smaller stream ilowing into tl 

 Poteau from the west; in the Arkansas River opposite Fort Smitl; 

 and in Lee's Creek, above the town of Van Bnren. 



The Poteau River is a rather muddy stream, flowing over shaly rock 

 and at the time we were there its waters were very low on account < 

 dry weather. Lee's Creek is a similar stream, but smaller, with clean 

 waters, made uj) of a succession of })ools, often nuiddy on the botton 

 alternating with stony shoals. 



The Arkansas River is there, as elsewhere, very muddy and rec 

 Fishes are scarce in that part of the river shallow enough for our net 

 to be used. 



The other streams mentioned are comparatively ricli in species, LTi 

 less otherwise specified, all the species below were fonnd both in th 

 Poteau and in Lee's Creek. 



1. Lepidosteus osseus LintiaMis. 



2. Lepidosteus tristcechus Blocii iSr Schiipiiler. 

 A large skin seen. 



3. Noturns miurus Jordan. 



4. Noturus nocturnus, sp. nov. 



Abundant in Ilowing water in the Poteau River. 



Head, 3'^ in lengtii ; <lepih, 5^; width of head, 4?. I). T, 0; A. 15 c 

 16. Lengtii, 2 to 3 inches. 



Body moderately robust, slenderer than in K. f/yrinus, but more r( 

 bust than iu iV. jiavns or N. inshjniH. Head not very large, little d( 

 pressed, rounded above. Eyes small, 2i in interorbital width, 5 to 

 in head. Lower jaw included. Band of j)remaxillary teeth not pr( 

 longed backward. Barbels shortish, the maxillary barbel scarcel 

 reaching gill-opening. Origin of dorsal fin a little nearer front of ad 

 pose fin than snout, its spine 2| iu head. Pectoral spine short, 2 i 



