220 Bulletin 47, United States National Museum. 



spring males. Length 12 inches. Streams of Oregon and Washington, 

 from Frazer River, southward, ascending Clark's Fork of the Columbia 

 as far as Flathead Lake, (Evermann), and Snake River to Shoshone Falls, 

 (Gilbert & Evermann); often entering the sea; abundant northward; 

 frequents the spawning beds of the salmon where it devours their eggs. 

 Specimens from Nanaimo sent us by Mr. Ashdown H. Green, who says 

 that this is the only Cyprinoid found in Vancouver Island, (caurus, the 

 northwest wind, hence caurinus, north western.) 



Cyprinus (Leuciscus) caurinus, RICHARDSON, Fauna Boreali Amer., in, 304, 183G, Columbia River 



at Fort Vancouver. 

 MylocheUns fralerculus,* GIRABD, Proc. Ac. Nat. Sci. Phila., 1856, 158, said to be from Monterey, 



California, probably erroneously. (Type, No. 211 (27G8). Coll. Trowbridge.) 

 Mylocheilus lateralis, AGASSIZ & PICKERING, Amer. Journ. Sci. Arts, 1855, 299, Columbia River at 



Fort Vancouver. (Type, No. 212. Coll. Suckley.) 

 Leucosomus caurinus, GUNTHER, Cat., vn, 270,1868. 

 Mylocheilus caurinus, JORDAN & GILBERT, Synopsis, 224, 1883 ; EVERMANN, Bull. U. S. Fish Comm., 



xi, 1891, 43, pi. 19, fig. 2. 



in. STYPODON, Garmaii. 



Slypodon, GARMAN, Bull.Mus. Comp. Zool., vin, 90,1881, (signifer). 



Body oblong, compressed, covered with large, deciduous scales. Lateral 

 line complete, decurved. Dorsal and anal fins short. Mouth small, 

 anterior ; premaxillaries protractile ; fold of lower lip not crossing the 

 symphysis ; lower jaw trenchant, without horny covering ; no barbels. 

 Gill rakers short. Pharyngeals strong. Teeth 3-3, of the Hylocliertn* 

 type, more or less cylindrical, with rounded grinding surfaces ; posterior, 

 more slender and subconical. (OTVTTOS, stump ; bdvi>G, tooth.) 



353. STYPODON SIGNIFEB, Garman. 



Head 3; depth 3|. D. 8 ; A. 8. Scales 6-35-2. " Teeth 3-3, stout, stump- 

 like, with convex summits." Dorsal and ventral outlines similar ; eye large, 

 longer than snout. Mouth oblique, the maxillary not reaching front of 

 eye ; lower jaw the longer. Pectorals not reaching ventrals, the latter to 

 anal. Brown; silvery below; a broad, brown lateral band, bordered 

 above by a narrow silvery line. Lago de Parras, an isolated lagoon in 

 Coahuila, Mexico. (Garman.) A singular fish o^ uncertain relations, 

 known only from the original type, (signum, sign ; fero, I bear.) 



Stypodon signifer, GARMAN, Bull. Mus. Comp. Zool., vin, 90, 1881, Lago de Parras, Coahuila, 

 Mexico ; JORDAN & GILBERT, Synopsis, 224, 1883. 



112. SEMOTILUS, Rafinesque. 

 (FALL-FISHES.) 



Semotilus, RAFINESQTTE, Ichth. Oh., 49, 1820, (dorsalisatromaculahts). 



Ijeucosomus, HECKEL, Russeggere Reisen, i, 1843, 1042, ("chrysoleucus"=corporalis'). 



Cheilonemus, BAIRD, in Storer's Hist. Fishes Mass., 285, 1855, (pulchellus = corporahs). 



Body robust ; head large ; mouth terminal, wide, the upper jaw pro- 

 tractile ; a small barbel on the maxillary just above its extremity, not at 

 its tip as in most other American minnows. (In young examples the bar- 

 bel cannot always be found.) Intestinal canal short; teeth 2, 5-4, 2, 



* Mylocheilus fraterculufi, GIRARD. According to Girard's description and figure this species is 

 slenderer than Mylocheilus caurinus, with shorter head and smaller scales. Head 4i in length; 

 scales in lateral line about 85. D. 8 ; A. 9. Monterey, California, (Girard). No recent collector 

 has found any Mylocheilus iu California and this locality needs confirmation, (fraterculus, a little 

 brother.) 



