542 PROCEEDINGS OF THE ACADEMY OF [DeC, 



preyed on by the common pike (Esox americanus). When a school 

 is found in such a place the individuals are invariably all headed in 

 one direction, and moving as if by one impulse when disturbed. Some- 

 times, however, they flash a little of their silvery sides as they move 

 about. When greatly agitated they do not seem to swim far, but soon 

 form into another school further on. I have only met with them in the 

 lower Delaware valley. 



Notropis jejunus (Forbes). 



Recorded from the Monongahela by Evermann and BoUman. I 

 have no material. 

 Notropis atherinoides Rafinesque. 



Head 4^ to 4i; depth 5} to 5^; D. iii, 7, i; A. usually iii, 9, i, 

 occasionally iii, 10, i ; scales usually about 40, sometimes 38 or 34 + 

 iLsually 2, sometimes 3; scales above 1. 1. usually 6, occasionally 7; 

 scales below 1, 1. 4; predorsal scales IG to 19; snout 3|- to 3f in head; 

 eye 3; maxillary 2^^ to 3f ; interorbital 2^ to 3^; teeth 2, 4-4, 2. 

 Body compressed, elongate, slender. Head compressed, blunt. Snout 

 conic, length f its width. Eye rounded. Mouth rather small, inclined, 

 jaws about even. Maxillary not quite to eye. Interorbital evenly 

 convex. Rakers 2 + 7 rather weak points. Scales rather narrowly 

 imbricated along middle of side. L. 1. decurved, complete. Dorsal 

 origin about midway between eye center and caudal base. Anal origin 

 trifle behind dorsal base. Caudal forked. Pectoral f to ventral. 

 Ventral inserted well before dorsal. Color transparent greenish above. 

 Dark streak down back medianly. Sides bright silvery-white. Spring 

 males with rosy snout. Length 2| to 4 inches. Two examples from 

 the Beaver R. and 2 from Lake Erie at Erie (Erie Co.). 



This handsome species is said to reach 6 inches in length. It occurs 

 in rivers and lakes west of the Alleghanies, usually in schools, and in 

 still water. 



Notropis rubrifrons (Cope). 



Alburnus rubrifrons Cope, Proc. Acad. Nat. Sci. Plxila., 1865, p. 85. Kiski- 

 minitas River. 



Head 3|; depth 4f; D. iii, 7, i; A. iii, 8, i; P. i, 13?; V. i, 7; 

 scales 36 + 3; scales above 1. 1. 7; scales below 1. 1. 4; predorsal scales 

 18; head width 2^^ its length; head depth at occiput If; mandible 2\; 

 depressed dorsal length 1^; anal length If; least depth caudal peduncle 

 2f'o; pectoral IJ; ventral ly^^; snout 3| in head from upper jaw tip; 

 eye ^to', maxillary 2|; interorbital 3y^. 



Body elongate, compressed, deepest at ventral origin, profiles simi- 



