162 NORTHERN FISHES 



sonius hudsoniiis (Clinton) of the Hudson River. Apparently there is 

 still some confusion to be cleared up in the taxonomy of this species. 



According to Hubbs and Cooper (lOSO) this species scatters its eggs 

 over sandy shoals in lakes. 



PALLID SHINER 



Notropis amnis Hubbs and Greene 



The northern pallid shiner ranges from southern Minnesota and 

 Wisconsin southward to Texas. Greene (1935) reported this species 

 from the Mississip})! River and its larger tributaries at Hastings and 

 southward. There are no specimens of this species in the University of 

 Minnesota collections. 



CENTRAL BIGMOUTH SHINER 



Notropis dorsalis dorsalis (Agassiz) 



This minnow (Figure 26F) is greenish in color, with a dark lateral 

 band on the side. The head is long and flat, the tail long and slender. 

 There are about 35 scales in the lateral line. The teeth are 1, 4 — 4, 1. 



The bigmouth shiner ranges from Wyoming and North Dakota east- 

 ward to New York and Pennsylvania. Friedrich (1933) reported this 

 species from the Mississippi River at St. Cloud. It was reported bj^ 

 Greene (1935) from the St. Croix and Mississippi rivers and their 

 tributaries. It is widely distributed in small rivers in central and south- 

 ern Minnesota and has also been collected from Leech and Cass lakes. 

 It prefers sandy streams. 



NORTHERN WEED SHINER 



Notropis xaenocephalus richardsojii Hubbs and Greene 



This minnow has a slender, dark-olive body, a dark lateral band, and 

 a spot on the tail. The anal rays number 7. There are about 37 scales 

 in the lateral line. The pharyngeal teeth are 2, 4 — 4, 2; some are den- 

 ticulate. The mouth is not as oblique as in A^. heterodon and the snout 

 is more blunt. This species reaches a length of 2 inches. 



The northern weed shiner ranges through southern Minnesota, Wis- 

 consin, northern Iowa and Illinois, and western Michigan. It was 

 reported by Greene (1935) from the St. Croix and Mississippi rivers as 

 Richardson's shiner, Notropis nux richardsoni. It prefers sluggish 

 waters. There are specimens in the University of Minnesota collections 

 from sloughs near Winona and Fountain City. 



BLACKCHIN SHINER 



Notropis heterodon (Cope) 



The blackchin shiner is moderately stout and has a lateral band 

 which in surrounding the muzzle is confined to the chin and the pre- 



