REPORT ON THE FISHES OP THE DEATH VALLEY EXPEDITION COL- 

 LECTED IN SOUTHERN CALIFORNIA AND NEVADA IN 1891, WITH 

 DESCRIPTIONS OF NEW SPECIES. 



By Charles H. Gilbert, Ph. D. 



LIST OF SPECIES. 



Ameiurus nebulosus Le Sueur. Salmo irideus Gibbons. 



Catotttomus arceopus Jordan. Salmo myhiss agua-bonita Jordan. 



Rhinichthys (Apocope) velifer, sp. nov. Cyprinodon macularius Girard. 

 Rhinichthys (Apocope) nevadensis, sp. nov. Cyprinodon macularius baileyi, subsp.nov. 



Rutilus symmetricus (B. & G.). Empetrichthys merriami, gen. et sp. nov. 



Lepidomeda yittata Cope. Gasterosteus williamsoni Girard. 

 Cyprinus carpio Linn. 



Ameiurus nebulosus Le Sueur. 



Two specimens of this introduced species were procured at Lone Pine, 

 on Owens River, where the species was reported as abundant. 



Catostomus araeopus Jordan. 



Type locality. — South Fork of Kern Biver, California. 



One specimen from Reese River, Nevada. Collected by Vernon Bailey. 



Rhinichthys (Apocope) velifer, sp. nov. (Plate vi, Fig. 2.) 

 Type locality. — Pahranagat Valley, Nevada. 



This species is closely related to BhinicMhys yarrowi, from which it 

 differs in the much larger scales, the lateral line traversing 55 instead 

 of 74 to 83 scales. Both species mark such perfect transition between 

 Apocope and BhinicMhys that it seems best to reduce the former to the 

 rank of a subgenus. About half the specimens of yarrowi have a nar- 

 ro 1 ?? frenum, and this is present in each of the three type specimens of 

 velifer. In both yarrowi and velifer the teeth are 2-4-4-2, as in typical 

 BhinicMhys. The only character left to distinguish Apocope is the nar- 

 rowness of the frenum when present, it being very wide in typical Bhin- 

 icMhys. 



Head 4 in length; depth, 4|. Snout narrow, but bluntly rounded, 

 not projecting beyond the front of premaxillaries. Frenum joining pre- 

 maxillaries to skin of forehead very narrow, varying in width in the 

 three type specimens. It will probably be found that some specimens 

 of this species, as of yarrowi, have protractile premaxillaries. Mouth 



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