100 EEPORT OF COMxMISSIONER OF FISH AND FISHERIES. 



developed mueli as in the female -8'. sconlcri. In both sexes there are 

 usually thirteen brancliiostegal rays on a side. 



Diagnosis. — From ^. proieuH^ Pal., by the conii)aratively small hump, 

 by its smaller size, and by its })roporti<inately larger scales. From 

 the S. scoulerl it may be known by its smaller size, spotted tail, and 

 small uniform teeth along the bodies of the maxillaries. 



Hac. — Anadromous, ascending the Columbia in autumn. Found ex- 

 ceedingly abundant in Okiua-kane liiver, where it is known to the wljites 

 as the "little red salmon," and to the natives as the ta-ah-nia. 



This species, which we have named after Doctor James G. Cooper, 

 who has spent much time investigating the natural history and physical 

 geography of Washington Territory, was obtained by George Gibbs, 

 esq., at the Okina-kane. 



8. cooperi. Two specimens (ty})ical) were obtained by Mr. Gibbs. 



" Okhia-kane Eiver, September 30, 18G0. This lisii is now drawing 

 to its spawning seasou. It frequents this river and the lakes above in i 

 immense numbers, its pecidiar color actuall}' reddening the bed of the ; 

 river. 



"Measurements. — Male. Length, 21.75 inches; head, 5 ; to dorsal 

 tin, 10; to ventral, 10.50; to anal, 14; to adipose, IG. Upper line oft 

 head very concave ; iris, yellow ; body, brick-red ; near the tail, scarlet; 

 caudal brown, profusely speckled with black. Female. Length, 22 : 

 inches; head, 450; to dorsal, 10; to ventral, 11; to anal, 11:.75; to adi- 

 pose, 16.75. 



" Colors. — Head, light greenish; back, brick-red, inclining to purple; 

 belly, dirty, yellowish gray; caudal, speckled; upper line of the head i 

 convex — the reverse of that of the male; eggs red and of the size of i 

 swan-shot; caudal but slightly lunated. 



"The fish measured above appear to be about the average size of ; 

 adults." 



4. SALMO DERMATIXUS, Eichardson. 



Syx. — Salmo dL'nnati)U(fi,Ricn. Zool. of the Voyage of tlie Herald, p. 169. PI. 



xxxiii. London, 1854, 

 ? Salmo jrrofciifi, Ricn. 



? Salmo fjihbei; Suckley, Annals N. Y. Lycenm. 

 Oiicorhjjiichiis dcnnatums, SucivLEY, "Notices of Certain New Sjieeies of tlie 



Salmonida'," &c. N. Y., Jnne, 1861. 



Sp. Ch. — (Condensed from Richardson's description.) Tongue, tooth- 1 

 less; S3ven or eight teeth on each premaxillary, uneq[ual; one or two at ■ 

 the tip larger t'lian the others, recurved. Maxillary armed with 18 to 

 21 acute subculate teeth, the first being stoutest, third and fifth next in 

 size. Dilated knob on end of lower jaw, armed with strong teeth. This 

 meeting the incurved snout (in males only '!) prevents the closing of the 

 mouth. Scales do not overlap each other, but are imbedded in a thick i 



