55. CEXTU.VUCHU9. 257 



;j. Centrarchus interruptus. 



( 'entravclui8 interruptus, Girard,Proc.Ac.Nat.Sc.Ph{lad. 1854, p. 129. 



uiaculosu.s, Ayres, Proc. Culiforn. Ac. Nat. Hist. 1854, p. 8. 



Ainbloplites interruptus, Girard, U. S, Pac. It. R. Exp. Fishes, p. 10, 

 pi. 2. f. 1-4. 



yv 13 . 6-7 



Tlic length of the head i.s about one-thiixl of the total ; the dia- 

 meter of the eye one-fourth of the length of the head. Greyish 

 brown, witli irreguUir darker transverse bands, interrupted along the 

 lateral line ; the portion of the band above is somewhat alternating 

 with that beneath it ; a large black spot above the angle of the oper- 

 culum ; two dark streaks diverge from the eye ba(-kwards. (Gir.) 



Rivers of California. 



4. Centrarchus irideus. 



Perca iridea, Pose. 



Labrus sparoides, Lacep. iiL pi. 24. f. 2. 



iris, Lacep. iv. p. 716. pi. 5. f. 3. 



macropterus, Lacep. iii. pi. 24. f. 1. 



Centrarchus irideus, Cue. Sf Val. iii. p. 89; Holhr. Ichth. S. Carol. 



p. 15. pi. 3. f. 1. 

 sparoides, Cur. i^ Val. vii. p. 458 (not pi. 48). 



^■T^. A. 



8-9 



Greenish, with series of black spots ; the rays of the vertical fins 

 with alternate black and wliite spots. Dorsal fin with a dusky spot, 

 bordered with orange near the posterior extremity of the fin (more 

 indistinct in old age). 



Charleston. 



5. Centrarchus hexacanthus. 



Centrarchus spai-oides, Cm: ^- Val. iii. p. 88. pi. 48. 



hexacanthus, Cui: &• Val. vii. p. 458 ; Kirtland, Post. Journ. iii. 



p. 480. pi. 29. f. 2. 

 Cichla storeria, Kirtl. Rep. Zool. Ohio, p. 191. 

 Pomotis liexacanthus, Holhr. Ichth. S. Carol, p. 36. pi. 6. f. 1. 



^■& A-TTTs- Ca^c. pylor. 8. 



The form of the head and body is similar to that of C. mieus. 

 Prffioperculum with some irregidar denticulations at the angle and 

 at the lower limb. Body and vertical fins irregularly spotted with 

 blackish. 



Fresh watei's of North America. 



a-e. Adult, half-grown, and young: skins. Streams leading into 



Lake Eric. From Dr. ParneH's Collection. 

 f-h. Young. 



n. Centrarchus nitidus. 

 Ponioxis nitidus, Girard in U.S. Pac. R.R. Exp. Fishes, p. 6. pi. 2.f.6-8. 

 D. -. A.^. 



15 17 



The height of the body is one-third of the total length, and more 



