Jordan and Evermann. Fishes of North America. 243 



Subgenus IOTICHTHYS, Jordan & Evermann. 

 384. LEUCISCUS PHLEGETHONTIS (Cope). 



Head 3f ; depth 3. D. 7 ; A. 8 ; scales 6-36-4, 17 before dorsal ; teeth 

 1, 5-4, 2. Body short, deep, compressed. Mouth short, very oblique, the 

 lower jaw projecting, the maxillary reaching front of eye, which is rather 

 large. Dorsal behind veutrals ; pectorals about reaching ventrals. 

 Lateral line entirely wanting, not a pore developed in the many specimens 

 examined. Olivaceous ; a broad plumbeous lateral band ; a dusky dorsal 

 line ; belly golden, probably red in spring males. Length H inches. 

 Tributaries of Great Salt Lake, and Sevier Lake (Basin of Lake Bonne- 

 ville) ; excessively common in ponds and warm pools. One of the smallest 

 of our fishes, and the most aberrant of those here referred to Leuciscus. 

 w, to flame.) 



Clinostomus phlegcthontis, COPE, Proc. Amer. Philos. Soc. Phila., 1874, 137, Beaver River, Utah. 



(Type, No. 16983. Coll. Yarrow & Henshaw.) 



Gila pJdcgelhontis, COPE, Zoiil. Wheeler's Expl. W. 100th Mer., v, 657, 1875, (1876). 

 Phoxinuit phlegethontis, JORDAN & GILBERT, Synopsis, 244, 1883 ; JORDAN, Bull. U. S. Fish Comm., 



ix, 1889, 34. 



117. RUTILUS, Kafinesque. 



(ROACHES.) 



Rutilns, EAFINESQUE, Ich. Oh., 48, 50, 1820. (rulilus : no type indicated on page 48 ; on page 50, 



rutilus* mentioned.) 

 Leticos, HECKEL, Russegger's Reisen, 1, 1038, 1843, (cisalpinus). (Not Leucns, KAUP, a genus of 



Gulls.) 



Cenisophius, BONAPARTE, Catologo Metodico Pesci Eur., 1846, 29, (paupenim no diagnosis). 

 Gardonns, BONAPARTE, I. c., (decipiens ; no diagnosis). 

 Pigus, BONAPARTE, I. c., (pigus ; no diagnosis). 

 Pseudophoxinus, BLEEKER, Prodromus Cyprin., 18GO, (zeregi). 



\Anchybopsis, COPE, Proc. Amer. Philos. Soc. Phila., 1870, 543, (laius, a fossil species). 

 Myloleucus, COPE, Bull. Hayden's Geol. Surv. Montana for 1871, 475, 1872, (pulvernlentus). 

 Siphaleles, COPE, Proc. Ac. Nat. Sci. Phila., 1883, 146, (citlatus), young with lateral line imperfect. 



Body stout, compressed. Mouth normal, oblique; no barbel. Teeth 4-5, 

 or 5-5, or 6-5, hooked, with moderate grinding surface. Scales moderate or 

 small. Lateral line continuous or incomplete, decurved. Anal basis short 

 or rather long. Abdomen not compressed. Intestinal canal not elongate. 

 Species numerous in Europe, Asia, and America. The American species 

 are certainly closely allied to the European type of Rutilus, Rafinesque, 

 (including Leucos, Heckel), differing in the presence of teeth 5-5 or 5-4, 

 instead of 6-5 or 5-5, as most of the species of Rutilus have. The anal fin 

 is long in JRutilw, of 10 to 14 rays as in Leuciscus proper, and as in Euro- 

 pean minnows generally, while in these American Roaches (Myloleucus) 

 there are but 8 anal rays. But as this character has not generic 

 value in Leuciscus and Notropis, it can not be admitted here. 



As in the case of Leuciscus, tho American forms are confined to the 

 western waters. They are dusky in color, and have small, loosely- 

 embedded scales which give an appearance unlike that of their relatives 

 in Europe. As in the other case, Austrian and Asiatic species (subgenus 

 Pseudophoxinus, Bleeker) seem to form connecting links. Rutilus zeregi has 

 teeth 5-5, anal rays 9, and scales about 63. We are therefore unable to 



*"I call this genus Rutilm, in tlio supposition that the Ci/prmim rnfili'x 111:1 v !> tin- type of it." 

 (Rajinesque. ) 



