REPORT ON THE FISHES OF THE DEATH VALLEY EXPEDITION COLLECTED IN SOUTHERN CALIFORNIA AND NEVADA IN 1891, WITH DESCRIPTIONS OF NEW SPECIES

Abstract

Ameiurus nebulnsus Lo Suour. Catostomus ara>opii8 Jordan. Rhinichthys (Apocope) vclifer, sp. no\ r. Rhinichthys (Apocope) nevudensix, up. nov. Rutilus eyminctricus (Β. Λ: (J.). Lepidomeda rittata Cope. Cyprinus carpio Linn. Salmo irideue Gibbons. Salmo mykiss agua-bonita Jordan. Cyprinodon macularius Girard. Cyprinodon macularius baileyi, subsp. nov. Kmpetrichthys merriami, gen. et sp. nov. Gastcrosteus williamsoni Girard. Ameiurus nebulosus Lo Sueur. Two specimens of this introduced species were procured at Lone Pine, on Owens Kiver, where the species was reported as abundant. Catostomus araeopus Jordan. Type locality.-South Fork of Kern Kiver, California. One specimen from Reese Kiver, 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 Rhinichthys yarroici, 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 Rhinichthys that it seems best to reduce the former to the rank of a subgenus. About half the specimens of yarrowi have a nar­ row freuum, and this is present in each of the three type specimens of velifer. In both yarrowi and velifer the teeth are 2-4-1-2, as in typical Rhinichthys. The only character left to distinguish Apocope is the nar­ rowness of the frenum when present, it being very wide in typical Rhin­ ichthys. 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 229