1908.] NATURAL SCIENCES OF PHILADELPHIA. 533 



before dorsal origin, reaches vent. Color above pale brownish. Dark 

 lateral band overlaid with grayish. Median dark streak down back. 

 Sides and below silvered. Fins pale brownish. Iris silvery, crossed 

 by dark lateral band. Length 1|-? to 2|^ inches. Many examples, 

 including the above cotypes : from the North East Creek headwaters 

 near Nottingham (Chester Co.) : Susquehanna R. basin in the Pequea 

 Creek at Paradise and in the Cocalico Creek at Swamp Bridge, Witmer's 

 Mills and run near Blainsport (Lancaster Co.) : Delaware R. basin in 

 Darby Creek at Collingdale (Delaware Co.) ; Schuylkill R. ; Holmesburg 

 (Philadelphia Co.); Hulmeville, above Newtown, Neshaminy Falls 

 (Bucks Co.); Abrams (Montgomery Co.). 



This species is closely related to N. hijrenatus, differing in the com- 

 plete lateral line, even in young an inch long. It is found in clear 

 streams or creeks, not too rapid, and usually about gravel bars, where 

 it associates in shoals with other species. It prefers the more upland 

 streams, and I have not yet found it in tide-water. The adult is 

 a beautiful little fish, averaging about 2| inches in length. It is sub- 

 ject to some variation. Though hardly brilliant in color, it is hand- 

 some, in certain lights the dark lateral band gleaming violet, blue 

 or greenish. It probably spawns in late spring and early summer. 

 It is said to be excellent bait, and good in the aquarium. I have 

 met with it only in the Susquehanna and Delaware basins. 

 Notropis keimi sp. nov. Plate XXVII. 



N. cayuga Fowler, Am. Nat., XLI, 1906, p. 595. Megheny R. above Port 



Allegany, McKean Co. (Not of Meek.) Fowler, I.e., XLI, 1907, p. 10, 



copied. 



Head 3f; depth 4|; D, iii, 6, i; A. iii, 7, i; P. i, 11; V. i, 7; 

 scales 37 + about 3; 5 scales above 1. 1.; 3 scales below 1. 1.; 15 pre- 

 dorsal scales; head wddth 1| its length; head depth as occiput If; 

 snout 3i; eye 3f ; maxillary 3; mandible 2f ; interorbital 31; first 

 branched dorsal ray 1^; first branched anal ray If; least depth caudal 

 peduncle 3yV; lower caudal lobe trifle longer than head, about space 

 equal to pupil diameter; pectoral If; ventral 1^. 



Body elongate, slender, compressed, edges rather broadly convex, 

 profiles similarly tapering from greatest depth at dorsal origin. Caudal 

 peduncle slender, compressed, least depth 2| its length. 



Head rather large, elongate, compressed, rather flattened sides not 

 convergent below, upper profile little more inclined than lower. 

 Muzzle obtuse. Snout obtuse, surface and profile convex, length about 

 f its width. Eye large, close to upper profile, trifle before middle 

 head length, rather eUipsoid or trifle longer than deep. Mouth inferior, 



