Biological Papers. 155 



A NEW SPECIES OF CAMPOSTOMA? 



By F. F. Crevecikuk, Ouaga. 



XT7HAT the writer thinks will prove to be undoubtedly a 

 ' ^ new species of fish of the genus Campostoma was taken 

 last spring in a small pool just above a gravelly riffle on Mound 

 creek, six miles northeast of Onaga. 



In the early years of the settlement by the white man the 

 fish was abundant every spring at riffles, where it was busily 

 engaged in the task of nest-building and spawning, but on the 

 streams filling up with soil washed down from cultivated fields 

 the fish disappeared from observation for about twenty -five 

 or thirty years. Last March, while approaching the creek on 

 a high bank overlooking the riffle in question, a great commo- 

 tion was seen in the water at the riffle. On closer examination 

 it was seen the turmoil was caused by a school of fishes com- 

 posed of the species mentioned above and of the minnow 

 Semotilus atromaculatus. The fishes were busy spawning, or 

 preparing nests in which to spawn. A few specimens of each 

 species were procured and sent to the National Museum, 

 where they were pronounced by Mr. B. A. Bean as Campos- 

 toma anomalum for the first species mentioned, and the other 

 the minnow as given above. Upon comparing the description 

 of Campostoma anomalum, as given in Bulletin No. 47 of 

 the United States National Museum, with our specimens of 

 Campostoma, it was found our fish differs from C anomalum 

 in several important particulars, chief of which are size and 

 color. The size of C. anomalum as given in the bulletin men- 

 tioned is from six to eight inches. Of many specimens of our 

 fish seen, both in early days and those seen and taken last 

 spring, none exceeded four and one-half inches. The colora- 

 tion of C. anomalum as given in the bulletin is as follows: 

 "Color brownish, with a brassy luster above, the scales more 

 or less mottled with dark; a dusky vertical bar behind the 

 opercle ; dorsal and anal fins each with a dusky cross-bar about 

 half way up, the rest of the fin olivaceous in the females, fiery 

 red in the males in the spring; iris orange in males. Males 

 in spring with the head and often the whole body covered 

 with large rounded tubercles." 



The color of our fish is a grayish-brown, with the scales 



