ADDENDA. 



Page 7. 

 In the diagnosis of Ceratlcldlujs, read " Barbels two or none,''^ in- 

 stead of " Barbels two." 



Page 9. 



Add to the " Synopsis of the genera," after Meda: — 



PharTTigeal teeth rudimental, replaced by a ridge of the bone... GO a. Graodus. 



Page 18, Catostomus duquesnii. 



We have received fi'om Mr. Cope two small examples from the 

 Roanoke River, with the name of Itychostomits cervinus (Cope). I 

 do not regard them as distinct from 0. duquesnii, although they ap- 

 pear to have a smaller head, the length of which is one-fifth of the 

 total (without caudal). 



Page 55. Labio rohita. 



n. Thirty-two inches long : skin. Calcutta. From Dr. Falconer's 

 Collection. 



Page 108. Barbus trispilus. 

 Prof. Peters informs me that this fish is identical with Barbus 

 trimacnlatus (p. 106), which was not apparent from the description 

 and figures. 



116. Add a new species : — 



71 a. Barbus collingwoodii. 



D. 11. A. 8. L. lat. 30-32. L. trausv. 6/4|. 



Th.e osseous dorsal ray is strong, coarsely serrated behind, its stiff" 



portion being two-thirds as long as the head. There are two or two 



and a half series of scales between the lateral Hnc and the root of 



the ventral fin. Body strongly compressed, scarcely elevated, Avith 



the profile of the back slightly arched ; its depth is one-fourth of 



