86 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



In all these specimens, which like all the fishes described in this 

 paper, were preserved in "formalin," there is seen a bright yellow 

 band running from the snout through the eye to the tips of the caudal 

 rays. Considerable yellow is also seen about the bases of the pectoral 

 fins and on the belly. However, since I have neither observed this 

 yellow in other specimens of this fish, nor seen mention made of it, 

 and, furthermore, find unexpectedly in some other species yellow 

 markings similarly distributed, I have come to regard it as due in 

 some way to the action of the formalin. 



5. Catostomus sucetta (Lac-.). CHUB SUCKER. 



Erimyzon sucetta, Jordan. 



Seven individuals are in the collection. Of these the largest has 

 a total length of 4^ inches; the smallest 2^5 inches. In all but the 

 smallest specimen, the dark lateral band is broken up into more or less 

 distinct blotches, and in some there are indications of dusky cross- 

 bands. 



6. Pimephales notatus (RafJ). 



This species was abundant. In all of the nine specimens saved 

 there is a very distinct lateral dark band, terminating behind in a 

 black caudal spot. 



7. Notropis heterodon (Cope). 



Numerous specimens of this handsome, but rather puzzling 

 species were captured. In all, the lateral band is black and termi- 

 nates in front on the snout and upper lip. There is also a line of jet- 

 black specks running from the vent to the base of the caudal fin. In 

 some cases, probably all, the teeth are 2, 4 4, 2. Is it not possible 

 that this is the normal number and that the two inner teeth, when 

 not seen, have been shed and not yet replaced, or have been broken 

 away in the process of extracting the bones? It sometimes requires 

 very close observation with a good microscope to discover that the 

 inner teeth have only recently been removed. 



8. Notropis hudsonius (De Witt Clinton}. SPAWN-EATER. 



This species appears to be common in the Kankakee river. 



9. Notropis megalops (Raf.}. SHINER. RED-FIN. 



Abundant. 



10. Notemigonus chrysoleucus (Mitch.\ GOLDEN SHINER. 



Five specimens taken, the largest 3^ inches in total length. 

 The descriptions of this fish do not usually at most, state that there 



