978 FISHES — PEECID^. 



than in the males; doisal and anal spines pointed in the female, in tbe male with 

 thickeneil, fleshy tips; scales moderate; lateral line extending about to end of first 

 dorsal ; neck and throat naked ; scales on sides extending up to the base of the dorsal 

 fin; color dark, each scale with a dark spot, these forming a series of oo)ispicuoas lon- 

 gitudinal lines along the rows of scales; second I'orsal and caudal conspicuously cross- 

 barred; head blackish, with dark stripes radiating fiom eje; males further marked 

 with conspicuous dark cioss-bars ; a black huojeral spot ; head 4 ; depth 5 ; D, VIII, 12 ; 

 A. II, 8 ; scales 7-53-7. Length 2-J- inches. 



Habitat, New York, Lake Erie, and Ohio Valley. Very abundant eastward. 



Diagnosis. — The short, low dorsal, and the projecting lower jaw, distin- 

 guish this species from all others in Ohio. 



Habits. — This species is very abundant in Western New York and 

 Pennsylvania, swarming on the bottom of every clear and rocky stream. 

 It is an active and hardy little fish. It is lound throughout the Ohio 

 Valley, but seems to be less abundant westward (Wisconsin and Illinois). 



In the Northwest occurs a closely related species or variety, Etheos- 

 toma lineolatum (Agassiz), <*istinguished by the presence of series of very 

 distinct, black, lengthwise stripes made of black dots. 



160. Etheostoma sqamiceps Jordan. 



Efheostoma squamiceps, Jordan, Bull. U. S. Nat. Mus., x, 1877, 11 ; Man, Vert,, 2d Ed., 

 1878, 228. ^ 



Description.— Body rather elongate, considerably compressed, the caudal peduncle 

 deep; head large; the jaws comparatively short, and equal; lateral line wanting only 

 on about ten of the poetexior scales, and with occasional tubes behind the continuouB 

 series; spinous dorsal low and short, the spines about equal, less than half the height 

 of the second dorsal ^ bases of the two dorsals about equal, slightly connected by 

 membranes ; color dark, without spots, stripes, or bands in spirits ; female mottled, 

 with about six cross blotches ; vertical fins cross-barred ; l"wer fins black in the male, 

 pale in the female ; a largi black humeral spot ; head 3 1-5; depth 5 ; D. IX, 12 ; A. II, 

 7 ; scales 5-50-6. Length 2$ inches. 



Habitat, Ohio Valley ; the known specimens beiug from KussellviUe, Kentucky, and 

 from New Harmony, Indiana. Nothing is known of its habits. 



Gbnus hi. PCECJLICHTHYS. Agassiz, 



PoBcilosoma, Agassiz, Lake Superior, 1850, 299 (name preoccupied). 

 Pceeilickthys, Agassiz, Amer. Journ. Sci. Arts, 1854, 305. 

 Oligocephalm, Girard, Proc. Acad. Nat. Sci. Phila , 1859, 67. 

 Aplesion, Girakd, Proc. Acad. Nat. Sci. Phila., 1859, 102 (not of Raflnesque). 

 Aetatichthys, Vaillant, Kecherohes aur Poiss. Eau Douce., Amer. Septent., Etheostom., 

 1873, 106. 



Type, Etheostoma ccsrulea, Storbr. 

 Etymology, poikilos, vatiegated; ioft<A««, fish. 



