Jordan and Evermann. Fishes of North America. 311 



placed, the lateral line incomplete in adult. Fins all small; front of 

 dorsal midway between base of caudal and middle of occiput, behind 

 base of ventrals. Ventral rays apparently seven, the outer rudimentary. 

 Brown, much speckled above, white below, a dark lateral stripe ending in 

 an obscure caudal spot. Warm springs in the deserts of southwestern 

 Nevada; Ash Meadows, Indian Creek, and Vegas Creek, Nevada. 



Rhinichthys (Apocope) nevadensis, GILBERT, Death Valley Expedition, 230, pi. vi, fig. 1, 1893, Ash 

 Meadows, Amargosa Desert. (Coll. Merriam & Bailey.) 



515. AGOSIA NUBILA (Girard). 



Head 3f to 4f ; depth 3 to 5; eye 3| to 5; snout 2 to 3. Dorsal 

 usually 8, sometimes 9, one or two rudimentary anterior rays; anal 7; 

 scales variable, ranging from 47 to 70, usually between 52 and 65. Teeth 

 1, 4-4, 1 ; 1, 4-4, ; 1,4-4,2; or 2, 4-4, 2. Barbel usually present, espe- 

 cially in coastwise specimens. Body not compressed, head rather short, 

 snout moderate, mouth inferior, horizontal or oblique. Fins not falcate; 

 origin of dorsal usually somewhat behind insertion of ventrals and 

 usually midway between base of middle caudal rays and posterior edge 

 of preopercle, but varying either way as much as diameter of eye. 

 Color usually dark grayish above, becoming paler below, a faint lateral 

 band of dark, extending through eye and around snout, especially plain 

 in specimens from the heavily wooded region of western Washington. An 

 extremely abundant and variable species, and a study of a large amount 

 of material from many different localities in the Columbia River basin 

 has not enabled us to recognize any differences of value for purposes of 

 specific separation. Length 3i inches. Basin of the Columbia River from 

 western Idaho, below the Shoshone Falls of Snake River to the coast, 

 and in coastwise streams from Washington southward into Oregon. 

 Specimens from the following localities are included under this species in 

 the above description : Clearwater River, Potlatch Creek, near Lewiston, 

 Idaho; Boise River, Caldwell, Idaho; Pataha River, Starbuck, Wash- 

 ington; Umatilla River, Pendleton, Oregon; Mill Creek, Walla Walla; 

 Walla Walla River, Wallula, Washington ; Coeur d'Alene Lake, Idaho; 

 Little Spokane River, Spokane, Washington ; Hangman Creek, Tekoa, 

 Washington; Columbia River Umatilla, Washington; Colville River, 

 Colville, Washington; Natchess River, North Yakima, Washington; 

 Newaukum River and Skookumchuck River, Chehalis, Washington. 

 (nubilus, dusky.) 



Argyreus nubilns, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 180, and Pac. B. B. Surv., 244, 1868, 



Fort Steilacoom, Puget Sound. (Type, No. 51. Coll. Suckley.) 

 Apocope nnbila, JORDAN & GILBERT, Synopsis, 210, 1883. 

 Agosia nubila, GILBERT & EVERMANN, Investigations in Columbia Biver Baain, 41, 1894. 



Represented eastward by 



515a. AGOSIA NUBILA CARRINGTONII (Cope). 



Head 3 to 4f ; depth 4| to 5 ; eye 4 to 4? ; snout 3 to 3. D. I, 9, 

 rarely I, 8; A. I, 7; scales 64, (53 to 72). Barbel usually present. Teeth 

 variable, but usually 1, 4-4, 2, hooked. Body rather stout, back little 



