Jordan and Evermann. Fishes of North America. 313 



517. AGOSIA UMATILLA, Gilbert & Everm-xnn. 



Head 4; depth 4| to 5; eye 3i to 4; snout 3. D. I, 9; A. I, 7; scales 

 13 or 14-63 to 70-7 or 8 ; teeth 1, 4-4, 1, hooked. Body rather slender, 

 back somewhat elevated ; head pointed, narrow : caudal peduncle com- 

 pressed, its least depth 2 in head. Origin of dorsal fin slightly behind 

 insertion of ventrals, midway between nostril and base of middle caudal 

 rays; dorsal falcate, its anterior rays nearly as long as head; rudimentary 

 rays not much enlarged nor spine-like ; anal strongly falcate, the anterior 

 rays much produced, about as long as head; pectorals not quite reaching 

 ventrals, 1 in head ; ventrals reaching front of anal, 1| in head; caudal 

 deeply forked. Color as in A. falcata, which it resembles, but from which 

 it differs in the absence or very weak development of ventral stays, and 

 in the notably smaller scales. Known from the Columbia River at Uma- 

 tilla and Payette River at Payette, Idaho. ( Umatilla, type locality.) 



Agosia wnatifla, GILBERT & EVERMANN, Investigations in Columbia River Basin, 42, pi. ix, fig. 2, 

 1894, Columbia River, Umatilla, Oregon. (Type, No. 45390. Coll. Gilbert & Rutter.) 



518. AGOSIA FALCATA, Eigenmann & Eigenmann. 



Head 3f to 4; depth 4i to 5; eye 3 to 4; snout 2f to 3. D. II, 9; 

 A. I, 7 ; scales 52 to 57. Body slender, caudal peduncle and head very 

 slender ; mouth inferior, nearly horizontal, overhung by the rather long 

 snout; eye large, interorbital space wide. Fins falcate; dorsal about 

 over insertion of ventrals, about midway between base of middle caudal 

 rays and pupil, its longest rays nearly as long as head; the two anterior 

 rays strong and spine-like; anal rays about as long as those of dorsal; 

 pectorals variable, usually nearly as long as head ; ventrals provided with 

 2 or 3 membranous stays uniting the inner rays with the body. Dark, 

 mottled above, blotched with dark on sides and at base of caudal fin; 

 head dark above and down to lower level of eye ; under parts pale. Fins 

 with some dark markings, especially the caudal; pectorals and ventrals 

 palest. Body and inner sides of pectoral fins often profusely covered with 

 minute tubercles. Columbia River basin ; locally abundant ; Boise River 

 at Caldwell, Idaho ; Payette River at Payette, Idaho ; Columbia River at 

 Pasco and Umatilla ; and Mill Creek at Walla Walla, (falcatus, falcate.) 



Agosia falcaia, EIGENMANN & EIGENMANN, American Naturalist, xxvii, February 4, 1893, 153, 

 Boise River, Caldwell, Idaho. (Coll. Eigenmann.) GILBERT & EVERMANN, Investiga- 

 tions in Columbia River Basin, 42, 1894. 



Agosia shusicap,* EIGENMANN & EIGENMANN, American Naturailst, xxvii, February. 4, 1893, 154, 

 Shushwap Lake, near mouth of Eagle River, British Columbia. (Coll. Eigen- 

 mann.) 



Agosia falcata shuxioap, EIGENMANN, Bull. U. S. Fish Comm., xiv, 1894, (July 7, 1894), 111. 



Subgenus AGOSIA. 

 519. AGOSIA CHRTSOGASTER, Girard. 



Head 4; depth 4; eye 4. D.8; A. 7; scales 88; teeth 4-4, without grinding 

 surface. Barbel small, but evident. Body fusiform ; head rather heavy, con- 

 ical ; snout tuberculate in males in spring. Mouth terminal, the upper jaw 



* Dorsal equidistant from base of middle caudal rays and posterior half of eye, inserted directly 

 over origin of vontrals; lateral band well marked, otherwise as in A. falcata. (Eigenmauu.) 

 Apparently not differing from A. falcata. 



