NOTES TO SECOND EDITION. 
Pacilichthys vitreus, p. 449. This is probably a species of Pleurolepis, as 
given by Prof. Jordan in his catalogue of the Fresh Water Fishes of 
North America. See Proceed. Buffalo Society Nat. Hist., 1877, p. —. 
Ceratichthys hyalinus Cope. p.459, This species is regarded by Prof. Jor- 
dan as the Rutilus amblops of Rafinesque. I have another species taken 
from the Ohio at Louisville, Kentucky, the original locality of Rafin- 
esque, which I have supposed to be the C. (R.) amblops, which is readily 
distinguished from the C. hyalinus. 
Placopharyna carinatus Cope, p. 467. This species Prof. Jordan informs 
me is not rare in the Wabash River, and he has also found it in the Scio- 
to River, Ohio. 
Ptychostomus Agass., p. 468. The name Mozostoma Raf. must be em- 
ployed for this genus as has been shown by Prof. Jordan, and Teretulus 
must be used for that called Mozxostoma by Agassiz, and Hrimyzon by 
Jordan. 
Carpiodes grayt Cope, p. 482. The habitat of this species was ascertained 
by Dr. Yarrow, of the Wheeler Engineer Survey, to be the Rio Grande, 
New Mexico. 
Carpiodes carpio Raf. Carpiodes nummifer Cope, p. 484, is believed by 
Prof. Jordan (Manual Vertebrata N. E. U. S.) to have been originally 
described by Rafinesque under the above name. 
