

136 NORTHERN ZOOLOGY. 



nished sometimes with six, sometimes with eight barbels : there are no palatine 

 teeth. 



DESCRIPTION 

 Of a specimen caught in Pine-Island Lake, lat. 54° N. 



Colour dark greenish-brown on the back and sides : on the belly whitish. 



Form. — Body oblong, tapering posteriorly ; belly tumid before the ventrals. No scales ■ 

 lateral line straight. Head flat and broad, its breadth equalling its length. There is a small 

 lengthening of the cranium at the nape, which is concealed by the thick smooth skin. Snout 

 obtuse, almost semicircular. Mouth at the extremity of the head, the upper lip slightly 

 overlapping the lower one. There are eight, barbels, two formed by the tapering labials and 

 reaching to the gill-openings ; two springing from the upper borders of the nostrils, about an 

 inch long; and two pairs on the lower jaw, the outermost and longest measuring two inches 

 and a half. Teeth small and erect in brush-like plates on both jaws : the palate and vomer 

 smooth. Dorsal sub-quadrangular : its bony first ray smooth. The pectoral spine also free 

 from denticulations. Adipose fin rather large and opposed to the posterior third of the anal. 

 Anal large and long, terminating one-third of its own length from the base of the caudal. 

 The latter has a wide shallow fork with obtusely-rounded lobes. The length of the specimen, 

 excluding the caudal, was thirty inches. 



Fins.— D. 1/6; P. 1/6; V. 9 ; A. 25; C. 17f 





