PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 91 



Kumbers 3^9-3(52 are "heads of Oncorliynclius nerlca caught at (/clilo, 

 10 miles above the Dalles, Oregon, May 15, 1881. Color of fish, as ap- 

 pearing then: Back, steel bhie with greenish reflections ; sides and belly, 

 pure silvery white. In a number of specimens I examined about that 

 time the vomerine teeth were not perceptible to the touch, but the two 

 rows where they are located can be seen plainly in nearly all the speci- 

 mens." 



Gill-rakers in number 3G1, 40; branchiostegals 11. 



5. Acrochilusalutaceus Ag. & Pick. Hard mouth. 



30297 (:]'oS) I specimen, Joliu Day River, Oregon, Aug. 15, 1881. 

 30-,'9H (369) 1 " " " " " 



Number 368 has: scales 22-89-16; persistent teeth on leftside 5, and 

 one deciduous; greatest depth equals head, 4^ in length to end of scales; 

 least depth of caudal ])eduncle 3 in head ; eye 1^ in snout, 4J in head ; 

 greatest width of cartilaginous plate of lower lip equals lower jaw, 3| 

 in head; longest anal ray nearly l.J times anal base; pectoral 5, ventral 

 6.^5 in length to end of scales; dorsal origin midway between snout aod 

 end ot scales; D. 10; A. 9; V. 9; length of fish 10 inches. 



Is'umber 369 has : sca'es 22-87-16; persistent teeth 4-5, one decidu- 

 ous tooth on one side and two on the other; greatest dep h of body 

 equal to head, 4J in length to end of scales; least depth of caudal pe- 

 duncle 3 in head; eye 5 in head, 1^ in snont; width of cartilaginous 

 plate on lower lip equals lower jaw and 3 in head; longest anal ray 1^ 

 times anal base; pectoral 5.^ in length to end of scales; dorsal origin 

 midway between snout and end of scales; ventral 7 in length to end of 

 scales; D. 10; A. 9; V. 9; length offish 11 inches. 



6. Rhinichthys transmontanus Cope. 



30332 (38:}) 4 specimeus, Garrisou Creek, Wash. Ter., July, 1881. 



Teeth 2, 4-4, 2; scales in three individuals examined were as follows: 

 14-77-14, 14-72-14, 14-68 to 70-14. In one of tbese I counted (SS scales 

 in the lateral line of one side and 70 on the other side. 



Dorsal midway between anterior nostril and end of scales, its base 

 equals % of its longest ray, which is 6 in length to end of scales; head 

 4.^, depth 5. pectoral 5 in length to end of scales; ventrals reach to vent; 

 pectorals do not extend to ventral origin; D. 8; A. 7; length of speci- 

 mens 3J to 4^ inches. 



7. Apocope nubila (Grcl.) Jor. & Gilb. 



30323 (383) .5 specimens, Garrisou Creek, Wash. Ter., July IS'^l. 



The larger of the two tyi)es of Argyreus nuhilus Grd. has the follow- 

 ing characters : (Greatest height of body very little more than length of 

 head, 4-4 in length to end of scales ; upper jaw reaching to vertical 

 through hind margin of posterior nostril ; eye 5 in head ; snout 3 in 

 head ; pectoral 5^, ventral 6i in length to end of scales ; longest dorsal 

 ray equal to longest anal, which equals head without snout ; D. 8; A. 

 7; V. 7; scales 12-60-10; length 4 inches; teeth 2, 4-1, 2, slightly 

 hooked, and with a very narrow groove beneath the hook. 



