151 



total length. Skin smooth. Head broad, flattened above, 

 smooth, with a few scattering patches of granulations. Jaws 

 equal, broad and r©uuded. Two flattened barbels depend 

 from the chin, and two similar ones from the angle of the 

 mouth. The first dorsal fin is high, triangular, with one 

 bony and seven soft rays^ tlie first ray rough in front, three 

 inches high, but continued six inches further by a soft, flat 

 filament, ending in a fine point. First pectoral fin bony, 

 strongly dentated behind, and with a similar filament as the 

 first dorsal fin. Small adipose fin. Blue above, tinged with 

 green; abdomen white. Length, 1 to 2 feet. 



Fin-rays:— D. 1.7; P. 1. 12; V. 6; A. 23; C. IT. 



A. rnarinus, Guenther, Y, p. 178. 



Silurus marinus, MitcJi. Lit. & Phil. Tran. New York, I, 

 p. 433. 



Galeivhfhys parrcc, Cuv. & Val., XV, p. 33. 



— marinus, Delvav, New York Fauna, Fishes, p. 178, pi. 

 37, fig. 118 (bad.) 



^luriclitl I ijs marinus, (rirard, Ichth. U. S. & Mc Bound., 

 pi. 14. 



Enters Siuepuxent and Chesapeake Bays fruia the ocean; 

 but is quite unpo[)ular with the peojjle of the southern coun- 

 ties of the Eastern Shore. It is said to hav^e become less com- 

 mon than formerly. 



AcAu. Coll. 



NOTURUS, llafin. 



N. flavus. 



Yellow Eack-taiL Stone Cat-Fish. 



Shape of the common Cat-Fish, but distinguished at once 

 by having the second dorsal fin, Avhich is very long and de- 

 current, connected with the tail; it has only rudiments of an 

 immature adipose fin. Anal fin elongate, widened behind. 

 Back and head yellowish-olive; sides yellow; nose, throat 

 and abdomen white. Fins slightly du^ky, diapliannus.— - 

 Length, 4 to 12 inches. 



Fin-rays:— 13. 1.7; P. 3.7; V. 8; A. 1. 7: C. Pj. 



Quite common in the Potomac Kiver and Canal alon*"- tlie 

 baundary of Washington county. It is also in the rocky 

 parts of the Patapsco Kiver, and smaller streams near Balti- 

 more. Lives beneath the stones in the streams runninf^ 

 through the metam:jri)hic rocks in Baltimore county. 



AcAiJ. Coll. S. I. 



