ROCK BASS. 941 
the tongue; lower jaw longest; a well-developed supplemental maxillary bone; gill- 
rakers long and strong, about ten of them on the anterior arch longer than the rest, and 
armed with teeth ; operculum without flap, ending in two flat points. 
The synonymy of this genus requires no special remark. The name Amblo- 
plites was first suggested by Rafinesque as a sub-genus of his Lepomis (1820, 
micropterus) but without characterization of any importance. In 1854, the genus was 
first established and characterized by Prof. Agassiz who retained Rafinesque’s name as 
by the laws of nomenclature he was obliged to do. But one species of Ambloplites is 
certainly known. 
‘ 
124 AMBLOPLITES RUPESTRIS (Rafinesque) Gill. 
Rock Bass; Goggle-eye; Red-eye; Lake Bass. 
Bodianus rupestris, RAFINESQUE, Amer. Month. Mag. and Crit. Rev., 1817, 120. 
Ambloplites rupestris, GILL, Proc. Acad. Nat. Sci. Phila., 1860, 20.—Coprsr, Journ. Acad. 
Nat. Sci. Phila., vi, 1869, 217 ; Proc. Amer. Philos. Soc., 1870, 451.—GiILBERT, Ohio 
Fish Com., 1878, 79.—NELSON, Rept. U.S. Fish Com., 1875-76, 790, 792, 796.—JorRDAN, 
Man. Vert., 1876, 231; Ann. N. Y. Acad. Sci., i, 1877, 100; Bull. U. S. Nat. Mus., No. 
10, 1877, 34; Man. Vert., 1578, 237; Bull. Hayden’s Geol. Surv., iv, 1878, 435; Bull. 
U.S. Nat. Mus., No. 12, 1878, 40, 46, 60, 75.—GooDE, Proc. U. 8. Nat. Mus., ii, 1879, 
114.—Bran Proc. U.S. Nat. Mus., 1880, 97, and of all recent American writers. 
Ichthelis erythrops, RAFINESQUE, Ichth Oh., 1820, 29. 
Cichla enea, LESuU&LUR, Journ. Acad. Nat. Sci. Phila,, 1823, 214. , 
Centrarchus eneus, Cuv. et VAL, iii, 1829.—K1iRTLAND, Zool. Ohio, 1838, pp. 168, 191.— 
DrEKay, Fauna N. Y., Fishes, 1842, 27,—THompson, Hist. of Vermont, 1842, 31.— 
STORER, Syn., 1846, 289.—GUNTHER, Cat. Brit. Mus., i, 1859, 256. 
Ambloplites eneus, GIRARD, U.S. P. R. R. Surv., 1858, 8. 
Centrarchus pentacanthus, CUv. et VAL. ili,, 1829, 88.—DEKay, Fauna N. Y., Fish., 1842, 
30.—STORER, Syn., 1846, 290. 
? Ambloplites cavifrons, COPE, Journ. Acad. Nat. Sci. Phila., vi, 1869, 217.—JORDAN, Man. 
Vert., 1876, 231; Bull. U. S. Nat. Mus., No. 10, 1877, 34; Bull. Hayden’s Geol. Surv., 
iii, 1878, 435; Man. Vert., 1878, 237. 
Description.— Body oblong, the depth about 24 in length; head 3 in length, the profile 
vonvex, eye about equal to snont, 34 to 3% in head,-about equal to length of opercle; 
cheeks with about eight rows of scales and a naked area; dorsal spines stout, rather 
low; D. XI, 11; A. VI, 10; lateral line with about 40 scales; general color, a brassy 
olive-green, with much dark mottling, the young irregularly blotched with black, the 
adult more uniformly colored, each scale with a equarish dusky blotch, these forming 
more or Jess distinct longitudinal stripes; fins dark olive the soft rays more or less 
barred; irisred. This species reaches the length of about a foot. 
Habitat, Vermont and Lower Canada to Great Lake Region. Minnesota. Dakota, 
and southward to Texas; chiefly west of the Alleghanies. 
Diagnosis.—This species may be known at once as the only one in 
Ohio having 10 to 12 spines in the dorsal and 5 to 7 in the anal. 
Habits.—This familiar fish is abundant in all streams, lakes and ponds 
-of Ohio. Like all the larger Centrarchidz it is an excellent pan fish, and 
