34 CHECK LIST OF THE 



D., 8; A., 7 or 8. 



Colour brownish with a brassy lustre above, the scales mottled ; a 

 black vertical bar behind opercle ; iris orange. Dorsal and anal each with 

 a dusky cross-bar about half way up ; in spring males the upper half of 

 these fins is fiery orange. In the spawning season, the males have the 

 head and frequently the entire body covered with large tubercles. Young, 

 mottled brownish, the lins plain. 



In this species the Intestinal canal is from six to nine times the total 

 length of the body, its numerous convolutions passing above and around 

 the air bladder, an arrangement found in Campostoma alone among all 

 the vertebrates (Jordan). It grows to a length of about eight inches and 

 .to widely distributed. 



I have not yet found this fish in our Province, but it should and 

 probably does occur in streams flowing into the Niagara River and into 

 Lake Erie. 



Genus CHROSOMUS. 



Body moderately elongate, little compressed; jaws normal; no barbel; 

 teeth 5-5 or 4-5, moderately hooked, with well marked grinding surface; 

 alimentary canal elongate, about twice as long as body ; peritoneum black ; 

 scales very small ; lateral line short or wanting ; dorsal behind ventrals ; 

 anal basis short. Size small. Colours in spring brilliant, the pigment 

 bright red. 



(27) Red-bellied Dace. 



(Chrosomus erythrogaster.) 



Body fusiform ; head conical with pointed snout ; caudal moderately 

 forked, its middle rays two-thirds as long as the outer. Scales, 18-80 to 

 •35-10; teeth, 5-5. Length about three inches. D., 8 ; A. , 7 ; V., 8 ; P., 12. 

 Colour, brownish olive, with black spots on the back, a blackish band from 

 above eye straight to the tail, sometimes breaking up in spots behind ; 

 another below, broader, running through eye, decurved along the lateral 

 line, ending in a black spot at base of caudal ; belly and space between the 

 bands bright silvery, brilliant scarlet in spring males, as are the bases of 

 the vertical fins ; the females are obscurely marked. 



This species has been taken in Algonquin Park by Prof. Macoun, but 

 I have no other records. 



Genus HYBOGNATHUS. 



Body elongate, somewhat compressed; mouth horizontal, the jaws 

 normal, sharp-edged ; lower jaw with a slight, hard protuberance in front ; 

 no barbel ; upper jaw protractile ; teeth 4-4, cultriform, with oblique grind- 

 ing surface and little if any hook ; alimentary canal elongate, three to ten 

 times the length of the body ; peritoneum black ; scales large ; lateral line 

 continuous ; dorsal inserted before ventrals ; anal basis short. Size mod- 



