FISHES 



POECILIIDAE. (The Killifishes.) 



33. Killifish. Fresh-water Killy. Fundulus diaph- 

 anus (Lesueur). Abundant in bays and shallow 

 inlets near the lake; usually found quite close to the 

 shore line, associated in small shoals. A fairly good 

 bait fish, though not as attractive as the bright 

 shiners and chub. This species attains a length of 

 about four inches. 



ORDER HEMIBRANCHIL (The Half-gills.) 

 GASTEROSTEIDAE. (The Sticklebacks.) 



34. Brook Stickleback. Eucalia inconstans (Kirt- 

 land). Common in small streams and ponds, where 

 it secretes itself among water plants, ready at any 

 moment to attack any small fish which approaches 

 its lair, or to dart upon passing insects small enough 

 to become its prey. This species is a nest-builder 

 and is particularly vigorous in the defence of its 

 eggs or young. It grows to a length of two and a 

 half inches. 



35. Ten-spined Stickleback. Pygosteus pungitius 

 (Linnaeus). Found in Toronto Bay and Ash- 

 bridge's Bay. Not abundant. 



36. Two-spined Stickleback. Gasterosteus Uspin- 

 osus (Walbaum). In the breeding season the male 

 is brilliant bluish or greenish above, with indistinct 

 dark bars, and generally bright red below. Length 

 in our waters about three inches. Rather common 



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