FAMILY COREGONIDAE 99 



The inland tullibee are excellent food fishes. Thej' do not bite readily 

 on a hook but must be taken in nets. In certain lakes, such as Ten Mile 

 Lake near Hackensack, Minnesota they will occasionally rise to a fly. 

 In many northern lakes they are heavily infested with the larvae of a 

 tapeworm, Triaenophorus, which forms large cysts in the back muscles 

 and renders the fish obnoxious. These worms are not injurious to man 

 and die when cooked. However, owing to this infection large numbers 

 of tullibee are annually condemned as unsuitable for food. Weights up 

 to 8 pounds have been taken, but ordinarily the fish is much smaller. 



SUPERIOR SHORTNOSE CHUB 



Leucichthys reighardi dymondi Koelz 



The chub is an elliptical fish which reaches a length of 1*2 inches or 

 more. The gill-rakers of the first branchial arch usually number less 

 than 39. The lower jaw is shorter than the upper and is unmarked or at 

 most only faintly pigmented. 



This species is found occasionally in the shallow water of Lake 

 Superior, where it ranges along the shores and shoals down to a depth 

 of about Q5 fathoms, where such depths are found close to shore. Koelz 

 (1929) states that this species probably spawns in November. The 

 spawning grounds in Lake Superior are unknown. This species has been 

 reported as spawning in May and June in Lake Ontario. 



SHORTJAW CHUB (Cisco) 

 Leucichthys zenithicus (Jordan and Evermann) 



The shortjaw chub is a large fish measuring 12 inches or more in 

 length. It is a slender-bodied, large-headed cisco with color and fins 

 much like L. nigripinnis cya7\opterus, which it closely resembles, as it 

 does L. reighardi. However, it spawns later than L. nigripinnis cyano- 

 pterus and has a longer snout than either of these other two species, from 

 which it differs in other respects as well. The lower jaw is slightly shorter 

 than the upper. The gill-rakers on the first arch usually number more 

 than 39 but less than 43. The lower jaw is unmarked or only faintly 

 pigmented. This species is much larger than L. kiyi and L. hoyi and may 

 be distinguished from L. artedi by having fewer gill-rakers on the first 

 branchial arch. 



This fish is rather abundant in deep water off the entire Minnesota 

 shore of Lake Superior. It is common around the Apostle Islands off the 

 Wisconsin shore. According to Koelz (1929) it is found in Lake Superior 

 at depths ranging from 10 to 100 fathoms or deeper, apparently ranging 

 not far from shore or from shoals but rarely found in shallow water. 



The shortjaw chubs are second to the lake herring, L. artedi, in com- 

 mercial importance. Koelz reports that they spawn on the bottom in 



