JULY, 1902. COLD-BLOODED VERTEBRATES FROM ONTARIO. 137 



GASTEROSTEID.E. 



I Eucalia inconstans (Kirtland). Brook Stickleback. 



Of 38 specimens from Trout Creek, one has 4 dorsal spines, 

 35 have 5, and 2 have 8 spines. Seven specimens from Sault 

 Ste. Marie each with 5 dorsal spines. 



Pygosteus pungitus (Linnaeus). Nine-spined Stickleback. 



Twenty-three specimens from Trout Creek; 3 have 8 dorsal 

 spines, n have 9, and 9 have 10. Two specimens from Chap- 

 leau, one with 8, the other with 9 dorsal spines; one, a female, 

 contained large eggs. 



PERCOPSID.E. 



Percopsis guttatus Agassiz. Trout Perch. 

 Very abundant at Hawkstone. 



CENTRARCHID^E. 



Ambloplites rupestris (Rafmesque). Rock Bass. 



This species does not occur in the lakes on the Highlands of 

 Ontario. It comes up the river to within about 8 miles of Bala. 

 Common at Orillia and Sault Ste. Marie. 



Eupomotis gibbosus (Linnaeus). Pumpkin Seed. 



This is the most abundant sun-fish in Ontario. It is found in 

 most of the lakes and. streams. Taken by us as follows: Oril- 

 lia; Gravenhurst; Bala; Katrine; Trout Creek; Sault Ste. Marie. 



Micropterus dolomieu Lace'pede. Small-mouthed Black Bass. 



Very abundant in Gull and Muskoka lakes. It and the wall- 

 eyed pike are the popular fish for anglers who visit this region. 

 The large-mouthed black bass is not known in these lakes. 

 Gravenhurst; Bala. 



PERCID.E. 

 Perca flavescens (Mitchill). Yellow Perch. 



This is the most common spiny-rayed fish in Ontario. Taken 

 by us as follows: Hawkstone; Orillia; Gravenhurst; Bala; Kat- 

 rine; Chapleau; Sault Ste. Marie. 



