398 | Storer on the 
tion of the dorsal fin, at the posterior third of the 
pectorals ; their m to their height as 2 to 7. 
The Anal fin is higher than long; its first two 
rays are spinous, - serrated behind, pesembling thena 
of the dorsal. 
The Caudal fin is lunated, its depth at the base to 
its length as 6 to 9. - 
The fin rays are as follows: D. 15; P. 154 Ya 
odabi a Gels, 
The appearances of this species i in eek forms of 
its fins, and many other particulars, vary exceed- 
. ingly by domestication. 
Catostomus. Le Sueur. 
Generic characters. Back with a single fin ; gill 
membranes three rayed ; head and opercula smooth ; 
jaws toothless and retractile; mouth beneath the 
snout ; lips plaited, lobed, or carunculated, suitable 
for sucking. Throat with pectinated teeth. 
C. Bostoniensis. Le Sueur. The common Sucker. 
_ Memoirs of Ame Academy of Arts and Sciences, vol. 
Journal Adily Nat Sciences, Phil. vol. i. et fig. 
This species was first described by Peck, in the 
* Memoirs of the American Academy of Arts and 
Sciences,” and quite well figured as the “ Cypri- 
nus catostomus" of Foster. In the excellent mono- 
graph of the genus “ Catostomus” contained in the 
first volume of the “Journal of the Academy of 
— Natural Sciences,” Le Sueur describes and figures 
