PANTOSTEUS GENEROSUS. 183 



39. PANTOSTEUS PLATYRHYNCHUS Cope. 



Flat-headed Sitclcer. 



1874 — Miiiomiis plali/rhifuclius COPK, Proc. Am. Pliilos Soc. Phila. 134. 



Fantostms platijrhynchus Cope & Yai:i;ow, \Vboelei'.s Expl. W. lOOtb Mer. v, 



Zool. G7:5, pi. xxis, f. 3, 3 a, 1876. 

 Paniostcna platyrhynchus Jordan & Copkland, Check List, 156, 1870. 

 Pantosiciis jfhityrhyncJuis Joi:dan, Bull. U. S. N;it. Mus. xi, p. — , 1878. 



Habitat. — Utah Lake aud tribntaries. 



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

 poor condition. Their remarkable sleuderness is donbtless in part due 

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

 resembles Catostoinus discobolus. It is also very similar to Pantosteus 

 generosus, but at i)resent I consider it distinct. 



Sjicciiiieiis in Untied States National Museum. 



40. PANTOSTEUS GENEEOSUS {Girard) Jordan. 

 Yarroiv's Suclca; 



1H5C — Catosiomus (Aconute) genei-osus Girakd, Pioc. Ac. Nat. Sc. Phila. 174. 



Acomu8 generosus Girard, U. S. Pac. E. R. Expl. x, 221, 1858. 



Catoatomus generosus Jordan & Copela.nd, Che( k List, 1.^)6, 1876. 

 1874 — Minomus jarrovii Cope, Proc. Aui. Philos. Soc. Phila. 35. 



Fantosteus jarrovii Cope & Yai;row, Wheeler's Expl. W. 100th Mer. v, Zool. 674, 

 1)1. xxix, 2, 2 a, 1876. 



Pantosteus lavroni Jordan &, Copkland, Check List, 150, 1876. 



Habitat. — Rio Graud*^, Colorado Basin, and Great Basin of Utah ; verj' abundant. 



This species is the most characteristic and most widely dili'used of 

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

 185G, under the name of Catostonnis 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 cotnparing 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 



