86 FISHES OF MASSACHUSETTS. 



above livid; sides, of a dull white. Between the eyes and the 

 snout, four prominent horns on each side ; the upper anterior the 

 largest, being two lines in height ; the upper posterior the small- 

 est. Beneath the first tubercle, a smaller is seen, and directly 

 behind it, a third, nearly as large as the first : these three first 

 form a triangle. Just above the third tubercle, and in front of 

 the upper anterior an^le of the eye, and between the nostrils and 

 the eye is a fourth tubercle smaller than the others. Eyes very 

 small j pupil black, surrounded by a red ring. Nostrils double. 

 Mouth small, lunated. Back rises suddenly on the nape of 

 the neck, leaving a sensible depression before it. 



The Dorsal fin arises upon the anterior half of the body j its 

 height one third less than its length. 



The Pectorals are reddish, with brown tips ; length equal to 

 one third their height. 



The Ventrals of the same color, and same length as the pec- 

 torals. 



The longest rays of the Anal fin more than one third higher 

 than the length of the fin. 



The lower lobe of the Caudal fin slightly longer than the 

 upper. 



The fin rays are as follows : D. 15 ; P. 16 ; V. 9 ; A. 10 ; 

 C. 22. 



I have no doubt that this is the " tuberculatus" of Le Sueur. 

 He describes his specimen as having but three tubercles. This 

 was owing undoubtedly to the smallest tubercle having fallen 

 off, which I find is the case with one on one side of the speci- 

 men before me, without leaving the slightest mark to point its 

 location. 



C. nigricans. Le Sueur. The black Sucker. 

 Journal Academy Nat. Sciences, vol. i. p. 102. 



By the kindness of Mr. H. Erastus Clap, of Walpole, I re- 

 ceived, in May, 1838, eight beautiful fresh specimens of this 

 species, which enabled me to test its goodness at my own ta- 



