Lake Maxinkuckee, Physical and Biological Survey 447 



about equalling those of soft dorsal ; first anal spine stronger and 

 somewhat longer than the second ; scales strongly ctenoid ; top of 

 head naked, nape densely scaled ; cheeks and opercles only partially 

 scaled, sometimes naked; breast nake'd; median line of belly with 

 ordinary scales ; ventrals close together, the space separating them 

 scarcely as wide as base of fin ; lateral line incomplete, usually 20 

 to 30 pores. Color of male, in life, light yellowish brown above, 

 with broad bars of pale olive brown; side with alternating blotches 

 of bright vermilion and pale bluish green, the vermilion follow- 

 ing the margins of the scales and giving the effect of cross-hatch- 

 ing, the green bars deeper and more distinct below lateral line 

 on the caudal peduncle but anteriorly they are most distinct above 

 middle of body; a small clear vermilion spot at base of pectoral; 

 opercle golden and greenish iridescent; dorsals and caudal with 

 series of dark spots on membranes; other fins pale; a dark line 

 downward from eye and one forward. Color of female in life, 

 light olivaceous above, side with about 10 rather distinct, irregular 

 vertical green bars or blotches, narrower than the interspaces, 

 which are rusty straw-color ; caudal barred with white and 5 light 

 brown bars; pectoral similarly barred but more faintly; spinous 

 and soft dorsals with small brownish spots in irregular series, the 

 spinous dorsal narrowly green-edged; back olivaceous, with about 

 8 indistinct greenish blotches alternating with the green lateral 

 bars; head light brownish; under parts whitish; a small darkish 

 spot on base of last dorsal spines. 



There is considerable variation in the coloration, some showing 

 considerably more red than others. We are not now able to recog- 

 nize E. aubeenaubei as a distinct species. If distinguishable at all, 

 it must be merely as a subspecies of E. iowse,, with which it seems 

 to intergrade. Typical specimens of the Aubeenaubee Darter were 

 found only in Aubeenaubee Creek. 



This discussion is based upon numerous specimens each about 

 36 to 44 mm. long collected on Long Point, August 11, 1900, and 

 several from Aubeenaubee Creek. 



63. RAINBOW DARTER 



ETHEOSTOMA CfERULEUM Storer 



This gaudy little fish is generally abundant in gravelly streams 

 of the Mississippi Valley. At Maxinkuckee it is not very common 

 in the lake itself, only a few having been obtained. They were 

 more common in the Outlet, particularly near the railroad bridge, 

 where there was a pebbly bottom and swift current. Here several 



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