Opisthomi and Anacanthini r37 
The haddock (Melanogrammus eglifinus) closely resembles 
the cod and is of similar quality as food. It is known at sight 
by the black lateral line. It is found on both shores of the 
Atlantic and when smoked is the “finnan haddie”’ of commerce. 
The pollack, coalfish, or green cod (Pollachius carbonarius) 
is alsocommon on both shores of the north Atlantic. It is darker 
than the cod and more lustrous, and the lower jaw is longer, 
with a smaller barbel at tip. It is especially excellent when 
fresh. 
The whiting (Merlangus merlangus) is a pollack-like fish com- 
mon on the British coasts, but not reachi&g the American shores. 
Fic. 488.—Pollock, Theragra chalcogramma (Pallas). Shumagin I., Alaska. 
It is found in large schools in sandy bays. The Alaska pollack 
(Theragra chalcogramma) is a large fish with projecting lower jaw, 
widely diffused in the north Pacific and useful as a food-fish to 
the Aleutian peoples. It furnishes a large part of the food of 
the fur-seal (Callorhinus alascanus and C. ursinus) during its 
migrations. The fur-seal rarely catches the true codfish, which 
swims near the bottom. The wall-eyed pollack (Theragra 
fucensis) is found about Puget Sound. Smaller codfishes of 
this type are the wachna cod (Eleginus navaga) of Siberia and 
the Arctic codling (Boreogadus saida), both common about Kam- 
chatka, the latter crossing to Greenland. 
Several dwarf codfishes having, like the true cod, three dor- 
sal fins and a barbel at the chin are also recorded. Among 
these are the tomcod, or frostfish, of the Atlantic (Mzcrogadus 
tomcod), the California tomcod (Microgadus proximus), and 
Micromesistius poutassou of the Mediterranean. These little 
cods are valued as pan fishes, but the flesh is soft and without 
much flavor. 
