Cockrrctl and dallmvcu/ — i^/.s-Ae-s of the Genus Notropis. 19o 



The following tal)le separates our three species: 

 Large fish with broad dorsal as well as lateral dark liauds; scales subcir- 

 cular, ratlier small, s<'nlpture distinct bnt not strong, radii 9 to 



12 N. scyZ/a (Cope). 



Boulder County, Colorado. 

 Small fish with reddish back, and nu distinct dorsal band; scales broader 

 than long. 

 AVith a distinct caudal spot; scales small, radii 10 to 12 



X. spectruu.culus (Cope). 

 Swannanoa K., Black Mt., N. C. 

 No distinct caudal sjxjt; scales large, very broad, radii lo to 18 



X. Jileunius (Girard). 

 Guadalupe K., Texas. 

 HuDSOXius (lirard. 

 The scales of the four species we possess can Ije separated thus : 

 Scales very broad. 



Size medium X. piptolepis (Cope). 



Boulder County, Colorado. 



Size very small X. gilherti Jordan & Meek. 



Scale moderately broad. 



Larger, broader X. /a(cZ.so?i/MS (DeAVitt Clinton ). 



Chautauqua Lake, N. Y. 



Smaller, rounder X. illecebrosus (Girard). 



Spring Brook, Neosho, Afo. 

 The junior author has tabulated them as follows: 

 Sculpture of scales distinct. 



Radii 11 to 14; scale large X. hudsonius. 



Sculpture weak. 



Scale of medium size. 



Nuclear area broad ; radii 14 to IS X. piptolepis. 



Nuclear area round ; radii S to 10 . X. illecebrosus. 



Scale very small ; radii t) or 10 X. gilberti. 



The fislies themselves may be tubulated thus: 

 Head short; large species (Great Lakes southeastward ) . . A'. Jindsonius. 

 Head comparatively large; small, slender sjjecies. 



Eye very large (Lower Arkansas II. basin) A', -illecebrosus. 



Eye moderate A', gilberti and A', piptolepis. 



AVe do not seem to find a stem-form here; the arrangement would 

 seem to be — 



giiherti 



piptulfptj 



ItutUofiiua 

 illecebrosus 



Figure 2. 



