PANTOSTEUS GENEROSUS. 183 



39. PANTOSTEUS PLATYRHYNOHUS Cope. 



Flat-headed Sucker. 



1874 — Alinomus platphyncluts Cope, Proc. Am. Philos Soc. Pbila. 134. . 



Fantosteus plaiurhynchus Cope &. Yakhow, Wheelet's Expl. "W. lOOth Mer. v, 



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

 Fantosteus platp-hynchas Jordan & Copeland, Check List, 156, 187G. 

 Fantosteus jylatyrhijnchus JoiiDAN, Ball. U. S. Nat. Mus. xi, p. — , 1878. 



Habitat. — Utah Lake aud tributaries. 



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

 poor conditiou. Their remarkable sleuderness is doubtless in part due 

 to their flabbioess. The species as noted by Professor Cope mucli 

 resembles Catostonius discobolus. It is also very similar to Fantosteus 

 generosuSj but at present I consider it distinct. 



Sjjccimens in United States National Museum. 



Number. 



Locality. Collector. 



12906 

 15163 



Utah Lake 

 Utah Lake 



Yarrow & Henshavr. 

 Yarrow «fc Hensbaw. 



40. PAl^TOSTBUS GENEEOSUS {Girard) Jordan. 

 Yarrow^s SucJccr. 



W56—Catostomus (Acomus) generosua Girakd, Proc. Ac. Nat. Sc. Phila. 174. 



Acomus ffenerosus Girakd, U. S. Pac. R. R. Expl. x, 221, 1858. 



Catostomxis generosus Jordan & Copeland, Check List, 156, 1876. 

 1874 — Minomus jarrovii Cope, Proc. Am. Philos. Soc. Pbila. 35. 



Fantosteus jarrovii Cope & Yap.row, Wheeler's Exj)!. W. 100th Mer. v, Zool. 674, 

 pi. xxix, 2, 2 a, 1876. 



Fantosteus yarrowi Jordan & Copeland, Check List, 15G, 1876. 



Habitat. — Rio Graude, 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 

 1850, 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, aud of comparing them with the 

 types of Fantosteus jarrovii. They seem to me to belong to the same 

 species, and I am therefore compelled to substitute the name generosus 



