1936] 



Schultz: Keys to Fishes 



155 



origin of 2nd dorsal; arch in lateral line flat-topped; anus located 



under the posterior edge of 1st dorsal fin base or under interspace 



between 1st and 2nd dorsal fins. Range: Siberia to Alaska. Marine. 



Abundant. 



Northern Cod. Wachna Cod. Fig. 39.. 120. Eleginus gracilis Tilesius 



4b. Transverse processes of vertebrae flattened and unswollen at tips ; 

 vertebrae 55 to 58; 1st dorsal with the posterior margin truncate; 

 depressed 1st dorsal extending for about l /~, its length beyond the 

 origin of 2nd dorsal ; lateral line breaking up into separate tubes 

 below the posterior % of the 3rd dorsal fin; arch in lateral line 

 evenly curved ; anus located under the posterior 4th of the 1st dorsal 

 fin base. Range : Alaska to Monterey. Marine. Common. 

 Pacific Tomcod. Fig. 40 121. Microgadus proximus (Girard) 



Fig. 40. Pacific Tomcod. Microgadus proximus. After Schultz and Welander. Cour- 

 tesy of Copeia. 



2b. Lower jaw equal to or longer than the upper jaw; the barbel very small 

 or absent on the tip of the chin ; always less than Y2 diameter of pupil ; 

 gill rakers on first gill arch more than 30; caudal fin distinctly forked 

 or concave behind. 



5a. Teeth in upper jaw slender, wide set, in 1 or 2 series ; subopercle 

 and postclavicle normal (similar to the other opercular bones), not 

 swollen nor ivory-like in adults ; distance from posterior tip of 

 2nd dorsal to origin of the 3rd dorsal y 2 the diameter of the eye ; 

 caudal fin forked; gill rakers 9 to 11 above the angle on the 1st 

 gill arch. Range : Arctic Sea, Greenland to Alaska and northern 

 Russia. Marine. 

 Arctic Cod 122. Borcogadus saida (Lepechin) 



5b. Teeth in upper jaw in a villi form band, the outer ones somewhat 

 enlarged and rather wide set ; subopercle and postclavicle swollen 

 and ivory-like in the adults (but normal in the young) ; distance 

 from posterior tip of 2nd dorsal fin to origin of 3rd dorsal from 

 2 /j, as long as to a little longer than eye; caudal fin slightly con- 

 cave; gill rakers 5 to 7 above the angle on the 1st gill arch. 

 Range : Puget Sound and coast of Washington and British Colum- 

 bia. Marine. Abundant. 



Puget Sound Pollack. Whiting 



123. Theragra chalcogramrna fucensis (Jordan and Gilbert) 



