M». 1077. M'JW WJlITEFItill FROM OlilJUON—JOliDAN AND SNYDER. 429 



species fig-ured b}^ Bean, which niiist be tiie original Corcgonus wil- 

 Ikim.soiii. Mr. Bean tells nie that (xirard's type-specimen is no more 

 in existence. Though we are not sure wliich species exists in the Des 

 Chutes Iliver, and perhaps both may be found there, we must assume 

 that Uirard's figure is correct. 



We have no specimens of C Oregon ks icilUamsoiil from the Colum- 

 bia Basin, for direct comparison with Coregonus oregonius. Exam- 

 ples from Sicamous, on Shuswap Lake, British Columbia (Coll. C. H. 

 Eigenmann), and numerous fine examples from the Truckee River, 

 California," which may be considered as, representatives of C. loll- 

 llamsouU seem not to differ from each other, but agree closely with 

 the figure and description published by Girard. The}^ differ notably 

 from Corcgonus oi-cgonius in the heavier body, deeper caudal pedun- 

 cle, shorter and less pointed snout, and in having a comparatively 

 small adipose fin, its base being only about two-thirds as long as that 

 of the anal. One poorly preserved specimen of the form called 

 Corcgonus cirinontanus, from Beaverhead River, Montana, appears 

 to agree ver}^ closel}^ with the above. Both the Beaverhead and 

 Shusuap specimens are smaller than those from the Truckee River, 

 and neither will serve to show slight differences if any such exist. 

 jMeasurements of the specimens referred to are here given. 



The types of Coregonus cis)7iontanus, from Horsethief Springs, 

 Madison River, Montana, are still smaller and less satisfactory. 

 Coregonus couesi Milner, from Chief Mountain Lake, the head of the 

 SaskatcheAvan, is doubtless the same as Coregonus cismontanus. 

 Coregonus couesi and Coregonus cis'montanus represent at the most 

 a subspecies of Coregonus wilUamsoni, with possibly smaller adipose 

 fin. 



Fin rui/s <unl in('u>iurcmviits of Corvyouas tvilliainnoni. 



Loealitv. 



Truckee River. 



Ticaverhead River, jroiitaiin 



SliUiswap Lake, Briti.sli Columbia. 



Scales 

 before 

 dorsal. 



Locality. 



Truckee River. 



Beaverhead River, M mtana 



Shuswap Lake, British Columbia. . 



Depth of 



caudal 



peduncle. 



14 

 I.') 

 14 

 13 

 14.3 



According to our present view, the status of the whitefishes of the 

 Pacific slope may be expressed thus: In the Columbia River are three 



o These were collected near Floristou, California, by Mr. S. J. Maudeville. 



