85. PEECID^ PQECILICHTHYS. 521 



wavy bands; first dorsal bright blue in the males, with a broad median 

 band of crimson; speckled in the females; top of head dark; black 

 streaks downward and forward from eye. Head 4; depth 5-J-. D. IX- 

 11; A 11,7; Lat. 1. 58. L. 2 inches. Indiana to Minnesota; abun- 

 dant in clear cold streams ; one of the prettiest of the darters. 



(Boleichthys cos Jordan & Copelaud, Proc. Acad. Nat. Sci. Phila. 1877, 4(5: Bolciclitliys 

 cos Jordan, Man. Vert. 228.) 



gg. Cheeks naked ; opercles scaly. 



2O. P. exiHis (Grd.) J. & G. 



Body compressed, tapering towards the caudal peduncle, which is 

 slightly coiit; acted. Eye large, subcircular, 3 in head ; maxillary 

 reaching anterior edge of pupil. Lateral line nearer the dorsal than 

 the abdominal outline ; pectorals extending further than the veutrals. 

 Yellowish-brown, speckled with grayish -black, dorsals and caudal 

 barred; a dark spot on the occipital region and a streak in advance of 

 as well as beneath the orbit. Head 4^ (with caudal). D. X-10; A. IF, 

 8. L. If inches. Little Muddy River, a tributary of the Upper Mis- 

 souri. (Girard.) Differs from P. eos in the naked cheeks. 



(Boleichlhys cxilis Girard, Proc. Acad. Nat. Sci. Phila. 1859, 103.) 



831. P. warrani (Grd.) J. & G. 



"Resembles P. exilis more than any of its congeners by the shape 

 of the body and the general appearance. It differs by a more compact 

 body, a proportionally shorter head, smaller scales, and the number of 

 fin rays. Giouud color yellowish-brown, the middle of the flanks macu- 

 lated with transverse spots of blackish ; the belly exhibiting a rather 

 orange hue ; the first dorsal has a series of vertically elongated black 

 spots resembling a dark baud across the middle of the fin ; the second 

 dorsal and caudal are transversely multilineated. A black streak may 

 be seen in advance of the orbit and another beneath it." D. IX-1! ; A. 

 11,9. L. 2 inches. Cannon Ball Kiver. (Girard.) Perhaps identical 

 with the preceding. 



(Bolcichthys warrcni Girard, Proc. Acad. Nat. Sci. Phila. 1859, 104.) 



22. P. gracinis (Grd.) J. & G. 



Slender and graceful; first dorsal lower and longer than the second; 

 anal much deeper than long ; tips of the ventral fins extending a little 

 further back than those of the pectorals. Olivaceous, spotted with 

 blackish ; second dorsal and caudal barred ; a longitudinal black streak 

 in advance of the orbits and a vertical one beneath them. Head 4 



