90 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



2. Coregonus Williamsonii Girard. 



30301 (344-345) 9 2 specimens. Mill Creek, tributary of Walla Walla R., May 1, 1881. 



30302 (352) 1 spec. Garrison " " 9, " 

 30303(353) 1 " " " " " " 



30304 (3.54) 1 " " " " " " 



30305 (355) 1 " " " " " " 

 30300(356) 1 " " " " '* " 



Xumbers 344 aud 345 are the " f'resli- water lierriug" of Mill Creek, 

 " caught with hook and line." 



Kiimbers 352 to 356, inclusive, are the " small-mouthed whitefish 

 caught in Garrison Creek, Walla Walla, by turning the water off. The 

 hsh takes a hook occasionally." 



Ifumber 344 is a female with the following characters: 



Head a little greater than depth of body, 4 in length to end of anal 

 when this is extended backward, slightly more than twice dorsal base. 

 Eye 4§ in head. Maxilla 3f in bead, mandible 3^. 13 or 14 gill-rakers 

 below angle. 13 rows of scales under dorsal base. Scales 10-90-8. 



Compare with this the type of Coregonus Couesil Milner, from Chief 

 Mountain Lake. This type, number 1414G, has: Head a little less than 

 depth of body, 4t in length to end of extended anal, If times dorsal 

 base. Eye 4^ in head. Maxilla 3^, mandible 3 in head. 14 gill-rakers 

 below angle. 13 rows of scales under dorsal base. Scales 0-88-8. 



iSTumber 345 is a female with the following characters: Head a little 

 less than depth of body, i^ in length to end of extended anal, 1| times 

 dorsal base. Eye 4i, maxilla 4^, mandible 3 in head. 15 gill-rakers 

 below angle. 13 rows of scales under dorsal base. Scales 10-87-8. 



Number 354 shows the following : Head ^ of depth of body, 4^ in 

 length to end of extended anal, li times dorsal 'base. Eye 4^, maxilla 

 4^, mandible 3 in head. 14 gill-rakers below angle. 15 rows of scales 

 under dorsal base. Scales 10-90-8. 



3. Oncorhyuchus chouicha (Walb.) Jor. »t Gilb. 



30290 (363) Grilse. Walla Walla R. May 18, 1881. 

 30320 (383) Garrison Creek. July, 



In determining the species of Oncorhi/nchus, to which the small exam- 

 ple number 383 belongs, I have relied upon the numerous anal rays 

 and branchiostegals as a guide. 



Number 363, the ''salmon grilse" of this invoice, is a hands'imely 

 spotted young male 16J inches long, with the following characters: Gill- 

 rakers 22; brjinchiostegals 17 ; a few weak teeth on head of vomer only ; 

 teeth in jaws all small, trout-like; dorsal with 11, anal with 16 divided 

 rays; scales from end of dorsal to lateral line 26, from dorsal line mid- 

 way between dorsal and snout to lateral line C*3; lateral line 145; liom 

 ventral origin to lateral line 28; pyloic ca^ca very small and numeious. 



4. Oncorhynchus nerka (Walb.) Gill & Jor. 



30291 (359) ^ head. Celilo, 10 miles above the Dalles, Oregon, May 15, 1881. 



30292 (360) S " " " " " " 

 30293(361) $ " " " " " " 

 30294 (36^) $ " " " " " " 



