41. AMIURUS. 101 



G. Amiurus punctulatus. 



? Pinielodus fleneus, Lesueur, Mem. Mus. a* Hist. Nat. 1819, v. p. 150 : 



Cm: 8f Val. xv. p. 135. 

 Pinielodus punctulatus, Cuv. $- Val. xv. p. 135. 



B. 12. D. 1/6. A. 16. P. T ^ n . V. 8. 



The lower jaw is the longer ; head one-fifth longer than broad, 

 much depressed, one-fourth of the total length (with the caudal) ; 

 the maxillary barbel has a broad base, and does not extend to the 

 end of the head. Dorsal spine feeble, not serrated ; pectoral spine 

 stronger, half as long as the fin. Caudal truncated. Brown, finely 

 marbled with black. ( Val.) 



New Harmony, New Orleans. 



7. Amiurus natalis. 

 Pinielodus natalis, Lesueur, Mem. Mus. a" Hist. Nat. 1819, v. p. 154. 

 Caudal fin subtruncated ; the tail between the adipose and anal 

 fins compressed, as high as the body below the dorsal fin*. 

 North America. 



/3. Caudal fin deeply forked. 



8. Amiurus nebulosus. 



? Pinielodus nebulosus, Lesueur, Mem. Mus. (V Hist. Nat. 1819, v. p. 149. 

 Pinielodus nebulosus, Ouv. 8f Val. xv. p. 132. 



B. 8. D. 1/6. A. 20-21. P. 1/8. 



Head not much longer than broad ; the maxillary barbel extends 

 to the end of the head. Dorsal and pectoral spines short, the latter 

 considerably stronger than the former, half as long as the head, and 

 serrated interiorly. Adipose fin short ; caudal distinctly forked. 



North America. 



a-b. Adult : stuffed. Presented by E. Doubleday, Esq. 



"We can scarcely doubt that we are correct in identifying our 

 specimens with the P. nebulosus of Valenciennes ; but it is not pro- 

 bable that P. nebulosus of Lesueur is the same species, as that author 

 describes the caudal fin as truncated or nearly truncated, whilst the 

 specimens examined by Valenciennes and by myself have a distinctly 

 forked caudal. 



9. Amiurus lupus. 

 Pinielodus lupus, Girard, in U. S. Pacif. R. R. Exped. Fish. p. 211. 

 D. 1/6. A. 24. P. 1/9. 



The maxillary barbels extend to about the middle of the pectoral 

 fin. Dorsal spine very obtusely denticulated towards its extremity, 



* Many specimens of Pimelodes with an adipose fin have a layer of fat depo- 

 sited along the back of the tail, so that this part appears unusually elevated. It 

 is not impossible that Lesueur founded the P. natalis on such a specimen. 



