156 University of Washington Publications in Biology [Vol. 2. 



lb. Dorsal fins 2; anal fin single. 



6a. Anal fin notched. 



7a. The 2nd dorsal and anal fin emarginate ; caudal fin truncate 

 behind; barbel absent; teeth in jaws canine-like and depres- 

 sable on hinge-like ligament; lower jaw longer. Range: Alas- 

 ka to Gulf of California. Marine. Common. 

 Pacific Hake 124. Merluccius productus (Ayres) 



7b. Dorsal fin scarcely if any emarginate ; barbel short, equal to 

 about l /z diameter of eye ; snout flat, depressed, and keeled on 

 sides. Range : North Pacific Ocean off Queen Charlotte Is- 

 lands in deep water. Marine. Rare. 

 125. Antimora microlepis Bean 



6b. Anal fin not notched ; the 2nd dorsal and anal very long but not 

 emarginate ; caudal fin rounded ; barbel present and longer than 

 the eye; teeth in jaws forming a broad villiform band; lower 

 jaw included. Range : Eastern and central United States, Co- 

 lumbia River system and north to Arctic waters. Freshwater. 

 Common. 

 Ling. Burbot. Lake Lawyer.. . .126. Lota maculosa (LeSueur) 



Family 40. Percopsidae. Trout Perches 



Range : Columbia River in lower portions. Freshwater. Not common. 



Columbia River Trout-perch 



127. Columbia transmontana Eigenmann and Eigenmann 



Family 41. Trachipteridae. Ribbon fish 



Range : Washington to southern California. Marine. Rare. 



Ribbon Fish . 128. Trachiptcrus rex-salmonorum Jordan and Gilbert 



Family 42. Lampridae. Moonfish. Opah 



Range : Open seas north to Newfoundland and north to Yakutat, Alaska. 

 Moonfish. Opah 129. Lampris regius (Bonnaterre) 



Family 43. Bothidae. 7 Sand Dabs 



la. Dorsal rays 88 to 102; anal rays about 71 to 81 ; vertebrae 38 to 39; inter- 

 orbital space wide, concave, scaly with a high bony ridge above lower eye ; 

 gill rakers on lower arch l2 to 16. Range: Kiska Island, Alaska, to Cerros 

 Island, Lower California. Marine. Common. 

 Mottled Sand Dab 130. Citharichthys sordidus (Girard) 



lb. Dorsal rays 79 to 89; anal rays 59 to 70; vertebrae 34 to 37; no high bony 

 ridge above the lower eye ; interorbital space not concave and not wide ; 

 gill rakers on lower arch 8 to 9. Range : Prince William Sound, Alaska, 

 to San Diego, California. Marine. Common. 

 Speckled Sand Dab 131. Citharichthys stigmacus Jordan and Gilbert 



'Some of the fin ray and vertebra counts have been taken from L. D. Townsend 

 (1936) Report No. 11, International Fisheries Commission. 



