1908.] NATURAL SCIENCES OF THILADELPHIA. 531 



Ring's Run and Black Horse Rim (Chester Co.); CoUingdale (Delaware 

 Co.); Holmesburg and Torresdale (Philadelphia Co.); Hatboro (Mont- 

 gomery Co.) ; Cornwells, Hulmeville, Neshaminy Falls, Little Neshaminy 

 Creek,. Bristol, Emilie, near Langhorne, Scott's Creek (Bucks Co.): 

 Susquehanna R. at York Furnace (York Co.). 



This pretty little minnow may best be known from the other mem- 

 bers of the genus by its incomplete lateral line. It closely resembles 

 N. procne, but may be distinguished by this character. It is usually 

 found in clear and rather still water,- in schools of moderate size, and 

 associated with other small fishes, such as killies and roach. They 

 occur both in tide-water and above, in the small creeks and runs, and 

 I have found them in the open rivers, though along shore. The sexes 

 are colored alike, though during the spawning season, in May and June, 

 the gravid females are much deeper-bodied. The young do not 

 differ much from the adults. Altogether it is a weak little fish, but 

 quite attractive, and said to be of use as bait. I have met with it 

 only in the lower Delaware and Susquehanna basins. Cope's types 

 of this species (Hybopsis bifrenatus) seem to be lost. 

 Notropis deliciosus (Girard). 



Recorded from the Monongahela R. as N. d. stramineus by Evermann 

 and Bollman. I have not seen any examples. 



Notropis procne (Cope). 



Hyhognathus procne Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 283. The 

 Conestoga. 



Head 3f; depth 4|; D. iii, 6, i; A. iii, 6, i; P. i, 13; V. i, 7; 

 scales 32 + 2; 5 scales above 1. 1.; 4 scales below 1. 1.; 12 predorsal 

 scales; head width 1| its length; head depth at occiput 1|; snout 3|; 

 eye 2f ; maxillary 3^; interorbital 2|; dorsal base 1|; anal base 2^; 

 least depth caudal peduncle 2^; pectoral 1^; ventral If. 



Body elongate, well compressed, profiles similarly fusiform or upper 

 only slightly more convex, deepest at dorsal origin, edges convexly 

 round. Caudal peduncle compressed, least depth about 2|- its length. 



Head moderate, robust, wider than trunk, profiles about similar. 

 Snout obtuse, convex, length f its width. Eye large, high, little longer 

 than deep, center near first f in head. Mouth moderate, iiiferiorly 

 terminal. Mandible slightly included, rather shaUowly depressed, 

 rami slightly elevated inside mouth. Lips thin. Premaxillaries 

 protractile down. Maxillary very slightly beyond front eye margin. 

 Jaw edges rather firm, trenchant. Tongue thick, fleshy, adnate. 

 Nostrils large, together, on snout above near eye, crescentic posterior 

 larger. Interorbital broad, flat. Preorbital width about If its length, 



