1911.] NATURAL SCIENCES OF PHILADELPHIA. 9 



Catostomus commersonnii (Lac^pede). " Sucker." 



Very abundant in the Christiana basin, and valued as a food-fish 

 chiefly in cold weather. Dr. Phillips found it in the Red Clay Creek 

 below Ashland and in Burrow's Run. Very many examples, of all 

 ages, examined, from Silversides, Naaman's Creek, Shellpot Run 

 and Wilmington. 



Erimyzon sucetta oblongus (Mitchill). '"Mullet." 



Common in almost all streams, and the young often associated with 

 young roach and Notropis chalybceus, characteristic of quiet lowland 

 waters. Many examples of all ages examined from Wilmington, 

 Millsboro, Milford, Laurel and Marydel. Though rather dark in 

 color, like other small fish from dark lowland waters, none showed 

 such intense melanism of similar fishes found in the deeply stained 

 cedar streams of the New Jersey lowlands. 



Ameiurus catus (Linnaeus). " White Catfish." 



A valued food-fish, and in some places reaching a good size. Said 

 to be common at Delaware City, Slaughter Beach, Lewes and Indian 

 River Bay. Cope found it in Mispillion Creek. Dr. Burgin has 

 secured it at Ship John Light, off the jetty at St. Georges and at 

 Delaware City. My examples from Wilmington and Laurel. 



Ameiurus natalis prosthistius (Cope). "Catfish. Black Catfish." 



I have 3 large examples secured in the Indian River at Millsboro 

 on October 14, 1910. This is quite interesting as being the first 

 instance of the species being known from the peninsula, It appears 

 to be frequent in this region, as a number of others were also secured 

 by the fishermen. 



Ameiurus nebulosus (Le Sueur). "Catfish. Yellow Catfish." 



Abundant in almost all waters, especially in the Brandywine and 

 Christiana Creeks. I have examined examples from Naaman's Creek, 

 Wilmington and Armstrong's Creek. This species was described once 

 from Mispillion Creek. 12 



Schilbeodes gyrinus (Mitchill). 



One labeled "Delaware" was obtained many years ago from Dr. 

 Pickering. 



Esex americanus (Gmelin). "Pike." 



Valued as a food-fish, though less so than the next, as it does not 

 reach so large a size. Many examples examined from Naaman's 

 Creek, near Chippewa, Armstrong's Creek, Wilmington, Delaware 



12 A??iinrus mispilliensis Cope, Proc. Am. Philos. Soc, Phila., XI, 1870, p. 486. 



