538 PROCEEDINGS OF THE ACADEMY OP [DeC, 



to 3^ inches. Many examples, from Kiskiminitas and Youghiogheny 

 Rivers, and Erie (Erie Co.). 



Found in the clear waters of the Ohio valley and Lake Erie. It is 

 a beautiful little fish, reaching 4 inches in length. At all times it is 

 largely bluish-silvery in general color. A good bait minnow. It 

 greatly resembles its eastern relative. 

 Notropis whipplii analostanus (Girard). 



Head 3^ to ^; depth 3^ to 4|; D. iii, 7, i; A. usually iii, 8, i, 

 occasionally iii, 7, i, seldom iii, 9, i, rarely iii, 6, i; scales usually 

 34, frequently 32 or 33, often 35, 31 or 30, occasionally 36, seldom 

 37 or 39, rarely 38, 28 or 27 + usually 2, often 3; usually 6 scales, 

 seldom 5 or 7, above 1. 1. ; usually 4 scales, rarely 5, below 1. 1. ; pre- 

 dorsal scales usually 14 or 15, frequently 13 or 16, seldom 17, rarely 

 12 or 11 ; snout 3 to 4 in head; eye 2^ to 4^; maxillary 2f to 4^; inter- 

 orbital 2-J- to 3; teeth 1, 4-4, 1. Body moderately slender, usually 

 rather deep in adult males, compressed, profiles similar. Head 

 pointed, compressed. Snout conic, about long as "wdde. Eye small, 

 little longer than deep, rather high. Mouth moderate, inclined. 

 Mandible included. Interorbital broadly convex. Rakers 2 + 7 

 short points. Scales narrowly imbricated. L. 1. complete, decurved, 

 low along caudal peduncle side. Dorsal origin midway between eye 

 front and caudal base. Anal inserted just behind dorsal base. Caudal 

 forked, lobes equal. Pectoral ^ to ventral, latter inserted trifle before 

 dorsal origin, fin reaches anal. Color olivaceous on back, scale edges 

 dusky. Iris silver-white. Sides bluish-white, below white, all silvery. 

 Fins in spring males with satin-white borders. Black dorsal spot 

 behind middle of fin above equals eye, variable, less evident in female 

 and young. Head above, muzzle and predorsal region finely tuber- 

 culate in spring males. Length 1|- to 3^ inches. A very large series : 

 from the Delaware R. basin at Kennett Square, Ring's Run (Chester 

 Co.); Brandywine Summit, Concordville, Markam, Colhngdale (Dela- 

 ware Co.); Barren Hill, Abrarns (Montgomery Co.); Holmesburg, 

 Torresdale (Philadelphia Co.); Cornwells, Hulmeville, Little Nesham- 

 iny Creek, Neshaminy Falls, near Langhorne, Bristol, Emilie (Bucks 

 Co.); Dingman's Ferry (Pike Co.): Suscpehanna R. basin at Para- 

 dise, Conestoga Creek, Trout and Akron Runs at Ephrata, Cocalico 

 Creek near Denver, Swamp Bridge, Witmer's Mills and run near 

 Blainsport (Lancaster Co.); York Furnace (York Co.). 



The silver fin is the most abundant of its genus in the Delaware, 

 contrary to the impression of some writers. It prefers clear water, 

 and usually the smaller streams and creeks, though often found in 



