-T ‘te 
E t e Fishes of Massachusetts. 401 
less than one anda half inches ; width across the body, 
from the commencement of the dorsal fin, about 
= three inches. This species is readily distinguished 
from the C. “  Bostoniensis," -our most common 
sucker, by its being less elongated, and deeper ; ý 
and by the gibbosity of the nape of the neck ; and 
from all other species, by the tubercles on its snout. 
Color above; dark brown; sides yellowish ; beneath 
white. Scales large, with golden reflections, and 
istinet radii. Length of the head, two inches four 
lines; 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 smallest. i 
Beneath the first tubercle, a ‘smaller is toda, FEES 
; gta behind it, a third, nearly as large as 
E : these three first form a triangle. " Jus tical E 
T third tubercle, and in frónt of the upper anterior — A zo 
Cm of the eye, and between e nostrils and the _ 
eye, is a fourth tubercle smaller than the others. 
M Eyes very small; pupil black, surrounded by a red — PT 
: - Ting. Nostrils mliia Mouth small, lunated. Back I : 
.. rises suddenly on the nape of the neck, leaving a iol? ky 
- sensible depression before it. 
The Dorsal fin arises upon the anterior half et d E 
body ; its height one third less than its length. ~ 
The Pectorals are reddish, with brown tips; 
length equal to on third their height. E. 
The Ventrals of the same color, and same "rie 
as the Menores. 
The le 
AAR E 
t os IlI—Iv. 
