FISHES OF THE ROCKY MOUNTAIN REGION Lr 
3. Dorsal spines strong and high, the longest usually longer than snout and eye; olive 
green, adults dark; sides with undulating greenish bars, becoming obsolete in adult 
(Rio(Grande) 5 ~3) ) = . . . Lepomis pallidus (Mitchill) (Blue-gill). 
Dorsal spines low, the fengest little lonversthan Shout! 2c) ine seas 
4. Brilliant blue and orange, the back chiefly blue, the belly entirely orange; cheeks orange 
with bright blue stripes; length 8inches. (Rio Grande) Lepomis megalotis (Raf.) 
(Long-eared Sunfish). 
The prevailing shade green, with a strong brassy luster on sides, which becomes 
nearly yellow below; each scale usually with a blue spot. (Boulder County, Juday; 
Rio Grande) . . . . . . Apomotis cyanellus (Raf.) (Blue-spotted sunfish). 
Spirit specimens of A pomotis cyanellus are a sort of bluish-gray or pale plumbeous, with 
a faint lattice-marking, and scattered small dark spots. The fish is quite unlike any other 
native in Boulder County. 
Fic. 8.—Etheostoma towe. 
Famity Percide (Perch Family) 
Mioplosus Cope, is a genus of the Green River Shales of Wyoming, with the following 
species: M. abbreviatus Cope, M. beani Cope, M. labracoides Cope, M. longus Cope, 
M. sauvageanus Cope. 
The living forms are as follows: 
Large fishes, with preopercle serrate; mouth large, terminal. . . . - I. 
Small fishes, preopercle entire or nearlyso . . . Beye ts pal 2: 
1. Canine teeth none; body oblong; ventral fins near iguether: hack dark olivaceous, 
sides golden yellow, with 6 or 8 dark bars (Montana, introduced) 
Perca flavescens Mitchill (Yellow Perch). 
Canine teeth on jaws and palatines; body elongate, head with a snakelike aspect 
(Upper MissouriR.) . . . . . . . Stizostedion canadense boreum Girard. 
(Northern Pike-Perch). 
2. Only one anal spine (A I, 7 to 9); length of fish about or nearly 70 mm.; scales larger 
than in E. iowe, about 13 mm. across; eye about 13mm. from mouth; dorsal fins 
touching, or slightly separated; parietal region of head concave. (Boulder Co., Juday) 
Boleosoma nigrum Raf. 
Two analspines; analrays6to8 . . . . RE Ny Saeco 
3. Humeral region with a distinct black process or pale: sates 46 to 55 in lateral line; 
snout much shorter than eye (Cafion City, Colo.) .  Etheostoma cragini Gilbert. 
Humeral region with at mostafaintdark spot . . - .- . . + 4 
