PANTOSTEUS GENEROSUS. 183 



39. PANTOSTEUS PLATYRHYNCHUS Cope. 



Flat-headed Sucker. 



1874Minomns plalyrliyncJnw COPE, Proc. Am. Philos Soc. Phila. 134. 



Pantoatcus platyrhyncltus COPE & YARROW, Wheeler's Expl. W. 100th Mer. v, 



Zool. 673, pi. xxix, f. 3, 3 a, 1876. 



Pantostcus platyrhynchius JOEDAN & COPELAXD, Check List, 156, 1876. 

 Pantosteus plat yrhynchus JORDAN, Bull. U. S. Nat. Mas. xi, p. , 1878. 



HABITAT. Utah Lake and tributaries. 



The specimens which I have seen of this species are all small and in 

 poor condition. Their remarkable slenderness is doubtless in part due 

 to their ilabbiness. The species as noted by Professor Cope much 

 resembles Catostomus discobolus. It is also very similar to Pantosteus 

 generosus, but at present I consider it distinct. 



Specimens in United States National Museum. 



*40. PANTOSTEUS GENEBOSUS (Girara) Jordan. 

 Yarrow's Sucker. 



Itio6Catos1omus (Acomus) generosus GIRAKD, Proc. Ac. Nat. Sc. Phila. 174. 



Acomus generosus GIRABD, U. S. Pac. R. R. Expl. x, 221, 1858. 



Catostomus generosus JORDAN & COFELAND, Che. k List, 156, 1876. 

 1874 Minomus jarrovii COPE, Proc. Am. Philos. Soc. Phila. 35. 



Pantoslcus jarroril COPE & YARROW, Wheeler's Expl. W. 100th Her. v, Zool. 674, 

 pi. xxix, 2, 2 a, 1876. 



Pantosteus ijarrom JORDAN & COPELAND, Check List, 158, 1876. 



HABITAT. Rio Grande, Colorado Basin, and Great Basin of Utah ; very abundant. 



This species is the most characteristic and most widely diffused of 

 the Suckers of the Great Basin. It was first described by Girard in 

 185G, under the name of Catostomus generosus. Girard's description, 

 unaccompanied by a figure, was so very loose and irrelevant that it has 

 hitherto remained unidentified. I have, however, had the opportunity 

 of examining Girard's original types, and of comparing them with the 

 types of Pantosteus jarrov ii. They seem to me to belong to the same 

 species, and I am therefore compelled to substitute the name gcncrosw; 



