4] . AMirRiTS. 99 



spine and with six soft rays ; anal fin of moderate length. Barbels 

 eight. Palate edentulous. Generally the upper jaw is the longer ; 

 head covered vdth skin above. Ventral with eight rays. 

 North America, China. 



This genus has been divided into the following groups : — 



a. Caudal fin subtruncated or but slightly eniarginate: AmiunK^ p. 99. 

 |3. (Caudal fin deeply forked : Ictalurus, p. 101. 



a. Caudal fin subtruncated or but slightly eniarginate. 



1. Amiurus catus. 



Silurus catus, L. Si/s(. Xai. i. p. 504 ; Bl. Sclrn. p. 387 ; Mitch. Joiini. 



Lit ^- Phil. Soc. 'Xcw York, i. p. 43.3. 

 Pimelodus albidus, Lesiieur, Mem. Mm. d'Hist. Nat. 1819, v. p. 148 ; 



Cm. Sf Val. XV. p. 131. 

 ? Pimelodus xanthocephalus, Hajiii. Ichth. Ohiens. p. 66. 

 Pimelodus catus, Cut}. S,- Val. xv. p. 124. pi. 432 ; Dekay, Neiv York 



Fauna, Fishes, p. 182. pi. 37. fig. 1 19 ; Oirard, in Froc. Acad. Nat. Sc. 



Phi/ad. 1859, p. 160. 

 The homed Pout, Storer, Rep. Fish. Massach. p. 102. 

 Pimelodus atrarius, Dekay, I. c. p. 185. pi. 36. fig. 116. 

 catulus, Girard, in U. S. Pacif. R. R. Expl. Fish. p. 208. pi. 41. 



figs. 4-6 (incorrect). 

 dekayi, Girard, in Proc. Acad. Nnt. Sc. Philad. 1859, p. 160. 



B. 8-9. D. 1/G. A. (19) 20-22. P. 1/9. Vert. 11/26. 



Head not much longer than broad ; the upper jaw is a little longer 

 than the lower ; the maxillary barbels extend to, or nearly to, the 

 end of the head in adult specimens, and beyond it in immature ones. 

 Dorsal and pectoral spines short, one-half or less than one-half of 

 the length of the head ; pectoral spine stoutish, denticulated inte- 

 riorly. Adipose fin short ; ciuidal subtruncated. 



North Americn. 



n. Fine specimen. Boston. Presented by W. Winstone, Esq. 

 h, c. Half-grown. New York. Purchased of Mr. Brandt. 



d. Half-grown : skin. Ohio Canal, near Piketon.' From Dr. Par- 



ncU's Collection. 



e, f, (j-h, i. Adult and young. North Ameiica. 



14. Pimelodus guttatus, Lacep. v. pp. 06 k 1 13. pi. 5. fig. 1 ; Cuv. ^- Val. xv. 



p. 14:J; Richards. Ichfh. Chin. p. 28.^. — China. 

 1.'). gracilis. Hough, in Fiffh Ann. Bep. of fhc Regent.^ of the Universifn 



on the Condition of thr State Cabinet of Nat. Hist. 4'C-, Albany. 1852, 



p. 26 ; Pimelodus houghi, Girard, in Prnr. Acad. Nat. Sc. Philad. 18.59, 



p. 1.59. — New York. Pennsylvania. 

 IG. Synechoglanis bcadlci. Gi/l. in Ann. Lye. Nat. Hist. New York, 1850, p. 40. 



— St. Catherine's, Canada West. 



1 7. Amiurus obesus, Gi/l, in Pror. Bn.st. Soc. Nit. Hist. 1 862. p. 45. — ? Nebraska. 



18. Pimelodus maeulitus. Rafin. Ichth. Ohiens. p. 02; P. coendescens, Rajin. 



I. c. p. GO ; P. pallidus, RaJin. I. c. — Oliio. 



19. cupreas, Rafin. Ichth. Ohiens. p. Go. — Ohio. 



h2 



