SILITEID^. — ex. 335 



much mottled; anal fin quite short, of 15 rays. A sin- 

 gular species, reaching a very large size, abounding on 

 the bottoms of our larger Western and Southern rivers. 



4. NOTURUS, Rafinesque. Stone Cats. 



* Intermaxillary band of teeth with strong lateral backward pro- 

 cesses, as in Pelodiehfhys. {Notv/rvs.) 



1. N. flavus, Raf. Yellow Stone Cat. Head much 

 depressed and flattened, little longer than broad; bar- 

 bels rather short; head 4|- in length; depth 5f ; distance 

 from snout to dorsal 3; rdiddle of body cylindrical, some- 

 what carinate above; adipose fin notched; spine of pec- 

 torals roughish behind, slightly retrorse-serrate in front. 

 St. Lawrence to Kentucky and Upper Missouri, abund- 

 ant, the largest species, reaching a length of a foot. 



** Intermaxillary band of teeth without lateral backward pro- 

 cess. (Schilbeodes, Bleeker.) 

 t Pectoral spines more or less serrate on the inaer edge ; adi- 

 pose fln notched. 

 a. Pectoral spines rather small, their internal serrse feeble, less 

 than half the diameter of the spine ; anal rather long, of 

 more than 14 rays. 



3. H. insignis, (Rich.) Gill & Jor. Maeginbd Stoke 

 Cat. Upper jaw decidedly longest; pectoral spine about 

 half length of head, pretty strongly retrorse - serrate 

 externally, dorsal spine much nearer anal than snout, the 

 distance from snout to dorsal more than one-third the 

 length; anal fin with 16 to 19 rays; body elongate; 

 head flattened; dusky, a distinct black margin to dorsal 

 and caudal fins; size rather large; Pennsylvania to S. 

 Carolina, abundant. [W. lenmiscatus, (Val.) Grd. IT. 

 marginatm, Baird.] 



3. N. exilis, Nelson. Slendbe Stone Cat. A sort 

 of "starved "representative of the preceding,: smaller 



