Raddife and Welsh — Fishes of Seneca Creekj Md., Region. 41 

 Annotated List of Species. 



SlLrRID^.. 



1. Ictalurus punctatus (Rafiuesque). 

 This species has been introduced into the Potomac River below Great 

 Falls and is apparently rare above the falls. Among the fish seined from 

 the canal, only a single example, 134 mm. long, was seen. 



2. Ictalurus furcatus (Le Sueur). 

 A single example, 555 mm. long, was obtained in the canal above 

 Violett's lock. The unusual conditions to which this specimen was ex- 

 posed serves to illustrate the remarkable vitality of catfishes. It was 

 captured about 10.00 a. m., December 13, carried in a cart without cover- 

 ing during the remainder of the day and in the evening placed in a live 

 box filled with carp. On the morning of the 14th it was lying on top of 

 the carp, out of the water, showing no signs of activity ; on the morning 

 of the 15th it was active. Being too large for our collecting cans, it was 

 wrapped in a newspaper, packed in a grip and thvis carried to Wash- 

 ington. In the afternoon, when unpacked, it appeared about as lively 

 as when first captured. 



3. Ameiurus nebulosus (Le Sueur). 



Abundant in the canal. 



4. Schilbeodes insignis (Richardson). 



This species is common in Tenmile Creek, near Boyds, apparently 

 being most abundant in the autumn. Examples up to 112 mm. in 

 length were collected. In the canal four small examples were taken at 

 a point below the lock, locally known as Buzzards Hole. 



Catostomid^. 



5. Catostomus commersonii (Lacepfede). 



Sparingly common in the canal. The young are common in Little 

 Seneca and Tenmile creeks. Those taken in the creeks in June, 1914, 

 may be arranged according to length into two groups, the first of speci- 

 mens 27 to 35 mm. long and the second of specimens 80 to 165 mm. in 

 length. The latter are believed to belong to the stock of the previous 

 year. 



6. Hypentelium nigricans (Le Sueur). 



Adults were abundant in the canal and the species also occurs in abun- 

 dance, especially the young, in Little Seneca and Tenmile creeks. On 

 June 6, 1914, many examples ranging in length from 25 to 140 mm. were 

 taken in the latter region. 



7. Erimyzon oblongus (Mitchill). 



Abundant in the canal. A male 330 mm. long had three tubercles on 



each side of snout. Color in life: back, brownish, crossed by nine 



blackish saddles of about width of three rows of scales ; sides, brown witli 



silvery and golden shades ; belly, silvery white ; body scales margined 



