518 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
alnindaiit in river channels. One of the most gorgeously-colored darters, 
but less graceful than most of ’them. 
{Etheosfoma ^enilca Storcr, Proc. Bost. Soc. Nat. Hist. 184.5, 47: Pceciliclithys cocrnlcus 
Agassiz, Bull. Miis. Comp. Zool. i, 5, 1833: Pwcilichthys variatm Jordan, Man. Vert, 
ed. 2, 223: Aatatktlitliys pulchellus Vaillaiit, 1. c. 113.) 
812. P. spoctatoilas Agassiz. 
Very similar to the preceding, but more elongate and rather more 
compressed; the colors similar, but the ni)per portion of the sides with 
distinct blackish stripes along the rows of the scales, and the ground 
color of the back and sides having a peculiar whitish or bleached ap- 
jiearance. The two dorsal fins usually well separated. Scales usually 
]»resent below and behind eye. Head 4; de])th4J. D. X-12; A. II, 7; 
scales 5-40-7; Lat. 1. on 20-25 scales. L. 2-3 inches. Mississippi Val- 
ley: rather less abundant than the other, and ascending small or even 
muddy streams. Probably merely a brook variety of the preceding, 
from which it is not always to be distinguished with certainty. 
(Agassiz, Amcr. Journ. Soi. Arts, 1854, 304; Jordan, Man. Vert. ed. 2, 227.) 
ec. Cheeks evidently scaly, at least above. 
813. P. asprigenis Forbes. 
Body rather stout, compressed. Head small and pointed. Eye large, 
longer than snout. Month terminal, oblique, the jaws even. Breast 
always naked; opercles scaly; cheeks closely scaled, the lower fourth 
rarely bare. Horsal fins usually separated. Coloration mottled green- 
ish ; the spinous’ dorsal dusky behind, in life with a broad band of bine 
and crimson ; soft fins speckled. Head 4; depth 4J. D. XI-12; A. II, 
8; Lat. 1. 49, the tubes developed on 34-41 scales. L. 2^ inches. Illi- 
nois Eiver. 
(Forbes, Bull. 111. Lab. Nat. Hist, i, 41, 1877; Jordan, Man. Vert. ed. 2, 404.) 
814. P. jessiiSE Jordan & Brayton. 
Body fusiform, rather deep and compressed. Head rather large, 
moderately pointed. Mouth rather large, terminal, the upper jaw 
slightly longest. Cheeks scaly above, the greater part naked; opercles 
scaly; throat naked; neck above scaly. Lateral line extending nearly 
to end of second dorsal. Fins moderate. Chestnut colored above, with 
about 9 quadrate bar-like blotches of a dark-blue color along the sides, 
and about 5 dark cross-blotches on the back; fins mottled with chest- 
nut; a yellow or orange band across the dorsal; second dorsal and anal 
speckled with golden. Head 4; depth 5. I). XII-12; A. II, 9; scales 
