FISH OF ONTARIO. 103 



bones of lower part of head extensiv^ely cavernous ; a -small but distinct 

 slit behind last gill ; gill membranes almost free from the isthmus, forming 

 a broad fold across it ; preopercular spines straight, simple, four in num- 

 ber, the lower turned downward ; fins large. 



( 1 lo) Lake Sculpin. 



(Triglopsis thompsoni.) 



Body elongate, very slender. Head long, depressed above. Snout 

 long and pointed ; eye quite large ; jaws subequal ; mouth large ; the max- 

 illary extending rather beyond middle of eye ; preopercle with four sharp 

 spines ; cavernous structure of skull highly developed ; upper surface of 

 head smooth ; gill membranes not broadly united ; nearly free from isth- 

 mus. Dorsal fins well separated ; spinous dorsal short and low ; second 

 dorsal very large ; anal high ; pectoral long, reaching past front of anal ; 

 ventrals well developed ; lateral line chain-like, conspicuous ; skin per- 

 fectly smooth. 



D. VII., i8; A., 15. 



Colour, pale olivaceous with darker blotches ; upper fins faintly 

 banded. 



Little is known of this species. Specimens have been taken occa- 

 sionally from deep water in Lake Ontario, but there are no other records 

 for this Province. 



Suborder ANACANTHINL 



Family GADID.'E. (Codfishes.) 



Body elongate, ending in an isocercal tail ; scales small, cycloid. 

 Mouth large, the teeth various. No pseudobranchiae. Vertical fins sep- 

 arate. Dorsal and anal long; no fin spines. Gill openings very wide, the 

 membranes free from the isthmus. Gills four ; air bladder present. Pyloric 

 caeca numerous. \'ertebrae, about fifty. 



Carnivorous fishes chiefly of the northern seas, many of them of great 

 economic value. One species in fresh waters. 



Genus LOTA. (Lings.) 



Body long and low, compressed behind; head small, depressed, rather 

 broad ; anterior nostrils each with a small barbel ; chin with a long barbel ; 

 snout and lower parts of head naked ; mouth moderate, the lower jaw 

 included ; each jaw with broad bands of equal villiform teeth ; vomer with 

 a broad crescent-shaped band of similar teeth; no teeth on palatines; gill 

 openings wide, the membrane somewhat connected, free from the isthmus ; 

 scales very small, embedded; vertical fins scaly; dorsal fins two, the first 

 short, the second long, similar to the anal ; caudal rounded, its outer rays 

 procurrent ; ventrals of several rays. 



