VERTEBRATE ZOOLOGY. 407 



wholly by a new generation. It will be in order for Ameri- 

 can ichthyologists to search for the species, for it is probable 

 that in proper stations they or kindred forms will be found 

 in the Western Atlantic. 



Fr esw -water Suckers . 



We are a:ain indebted to Professor Jordan for the much- 

 needed revision and characterization of another group of 

 fresh-water fishes this time the Suckers, or Catastomids. 

 The family value of this group is recognized, and the three 

 subfamilies defined by Gill in 1861 are retained. Thirteen 

 genera are adopted, 8 of which belong to the subfamily of 

 Catastomince, 1 to the Cycleptinw, and 4 to the JBubalichthy- 

 nce. These genera are definable chiefly by the modifications 

 of the mouth, the single or double constriction of the air- 

 bladder, resulting in two or three chambers, and the differ- 

 ences in the pharyngeal bones and their teeth. All the 

 known species save two are peculiar to America, the only 

 exceptions being the Catastomus rostratus of Eastern Siberia, 

 and the Myxocyprinus asiatieus of China ; of the others, 52 in- 

 habit the streams and lakes of the United States and British 

 America, and a single species (Bubalichthys meridionalis) 

 has been discovered in a river (Rio Usumacinta) of Guate- 

 mala. The predominant genera are 3fyxostoma (Ptychosto- 

 mus of Agassiz) and Catastomus ; of the former, 17 species 

 beincr recognized bv Professor Jordan, and of the latter 14. 

 The " Buffalo fishes," or " Carps," of the Mississippi and Great 

 Lake basins appear to be quite satisfactorily determined; the 

 bulk of the species (7 in number) belong to the genus Carpi- 

 odes, while Bubalichthys has 2, and all the forms of Ichthyo- 

 bus are reduced to a single species. 



The North American Trout and Salmon. 



Prominent as are the typical Salmonids as game fishes, 

 their species have been by no means w r ell determined, and 

 there has existed great difference of opinion as to the value 

 of characters manifested in the American as well as foreign 

 representatives of the family. Dr. George Suckley, in his 

 monograph on the " North American Species of Salmon and 

 Trout," recognized 43 species, and since his time several have 

 been added, which he would doubtless have admitted as valid 



