240 PROCEEDINGS OF THE ACADEMY OF [Feb., 



second simple ray longest, and together with first and second developed 

 rays reaching beyond others or about opposite base of last anal ray. 

 Anal inserted well behind last dorsal ray in vertical, similar to dorsal, 

 and reaching f of space to base of dorsal. Caudal rather long, forked, 

 and lobes pointed. Pectoral low, not reaching ventral or only about | 

 of space. Ventral placed well before dorsal, and not reaching anal. 



Color in alcohol with gromid-color pale brown, back and upper sur- 

 face more or less dusky, becoming deeper on median line of back and 

 each scale with a blackish-dusky edge. A broad black longitudinal 

 band, about as wide as orbit on costal region otherwise a trifle nar- 

 rower, extends from snout including front of mandible to base of 

 caudal where it forms a spot. Above this band on side of trunk and 

 along its upper edge ground-color is lighter like lower surface. Along 

 base of anal a bar of dusky which fades out on lower surface of caudal 

 peduncle. Dorsal, caudal and upper edge of pectoral pale dusky, 

 fins otherwise whitish. Black band over opercle reflected in same color 

 inside of gill-opening. Iris deep slaty. Peritoneum pale brownish 

 thickly sprinkled with minute dusky dots. 



Length 2/q- inches. 



Type No. 19,860, A. N. S. P. A broken dam on the Batsto river, 

 New Jersey. E. D. Cope. 



Also 18 co-types, Nos. 19,861-78, A. N. S. P. Same data. 



This form differs from Notropis chalybceus (Cope) of the Delaware 

 in its more dusky and deeper coloration. The lateral longitudinal 

 band is also broader throughout its course, the pectoral more dusky, 

 and the dusky dots which are collected along the base of the anal extend 

 along the lower surface of the caudal peduncle to the caudal. This 

 is true of all the Batsto minnows. All of those from the Delaware com- 

 prise a large series which I collected in late spring and early summer, dur- 

 ing 1899, in a small stream flowing into the upper end of the mill-pond 

 at Bristol, Bucks County, Pennsylvania. These have the lateral band 

 distinctly narrower. As yet I have not taken Notropis chalybceus in 

 any other part of the Delaware basin. 



(Named for Dr. Charles C. Abbott, an earnest student of the fishes 

 of New Jersey.) 



Explanation of Plate XVII. 



Notropis chalybceus abbotti Fowler. 



Type No. 19,860 A. N. S. P. Batsto river, New Jersey. (Upper figure.) 

 Notropis chalybants (Cope). 



No. 23,983, A. N. S. P. Delaware river at Bristol, Pennsylvania. (Lower 

 figure.) 



