190S.] NATURAL SCIENCES OF PHILADELPHIA, 537 



first tributary below Mill Run, Ring's Rim (Chester Co.); Holmesburg, 

 Torresdale (Philadelphia Co.); Hulmeville, Neshaminy Falls, Bristol 

 (Bucks Co.); Dingman's Ferry (Pike Co.): Susquehanna R. basin, 

 Pequea Creek at Paradise, Cocalico Creek near Denver and at Wit- 

 mer's Mills (Lancaster Co.). 



A very abundant minnow in the lower Delaware and Susquehanna 

 basins. It is usually found in the larger creelcs and rivers, and readily 

 takes a hook. It is good as bait and though said to reach 8 inches in 

 length, it is seldom that examples are met with over 4 or 5 inches, 

 thus being too small as a rule to use as pan fish. I have never seen 

 any over 6 inches. It is distinguished from the preceding chiefly 

 by the very faint or pale caudal spot, though in the young it is always 

 somewhat in evidence. Young examples also have the lateral line 

 incomplete, only as a few tubes at the beginning of its course. It 

 usually occurs in schools and while more a feature of open rivers, both 

 at the head of tide and above, it does occur, contrary to the statements 

 of some writers, in our smaller streams or runs. It is also subject to 

 considerable variation in structure, though the coloration remains 

 about the same throughout the season, there evidently being no gaudy 

 nuptial-dress. 



Notropis whipplii (Girard). 



Head 3f to 4^; depth 3f to 4f ; D. iii, 7, i; A. iii, 7, i, rarely iii, 

 8, i; scales usually 38, sometimes 36, 37 or 39, rarely 35 + usually 2, 

 frequently 3; usually 7 scales, frequently 6, above 1. 1.; usually 4 

 scales, frequently 5 below 1. 1. ; predorsal scales usually 17, frequently 

 16, rarely 15, 18 or 19; snout 3 to 3y in head; eye 3^ to 4§; maxillary 

 3 to 3f ; interorbital 2^ to 2|-; teeth 1, 4-4, 1. Body moderately 

 slender, compressed, profiles similar. Head pointed, compressed. 

 Snout convex, length f its width. Eye small, little longer than deep, 

 rather high. Maxillary not quite to eye. Mouth moderate, inclined. 

 Mandible included. Interorbital broadly convex. Rakers 3 + 8, 

 slender, pointed, short. Scales narrowly imbricated. L. 1. complete, 

 decurved, little low along caudal peduncle side. Dorsal origin trifle 

 nearer front nostril than caudal base. Anal origin slightly behind 

 dorsal base. Caudal well forked, slender lobes pointed, equal. Pec- 

 toral about f to ventral, latter inserted well before dorsal, reaches 

 vent. Color olivaceous on back, each scale dusky-edged. Iris silvery- 

 white. Sides bluish silvery-white, below white. Satin-white ends 

 to fins of spring males. Black spot on dorsal behind middle 

 above, equals eye, variable, less conspicuous in female and young. 

 Front and head minutely tuberculate in spring males. Length 2f 



