123 FISH HAK VESTING. 



immediately behind the base of the pectorals; 

 ventrals inserted anterior to the second dorsal 

 spine. The colour is very much like that of G. 

 serratus, but more decidedly purplish on the 

 sides ; the eyes bright red in both species, when 

 fresh from the water. 



Gasterosteus concinnus, the Tiny Stickleback 

 (Rich., F. B. A., p. 57, vol. iii.). *S/?. Ch. : Head 

 one-fourth of the total length, mouth small, and 

 teeth but feebly developed; dorsal spines nine, 

 seventh and eighth smaller than the preceding 

 ones, the ninth longer than any of the others. 

 The abdomen is protected by a bony cuirass, and 

 the ventrals represented by two spines. All the 

 spines are moveable, and destitute of serrations. 

 Colour of the back a bright sea-green, sides 

 purplish-pink, shading away to a silvery- white 

 on the belly ; the entire body speckled with 

 minute black spots. 



This handsome little stickleback, though 

 smaller in size than his brethren, is vastly more 

 abundant. Sir J. Richardson speaks of it ' as 

 being common in the Saskatchawan, ranging as 

 far north as the 65th parallel.' So abundant are 

 they in the lakes and pools about Cumberland 

 House, east of the Rocky Mountains, that sledge- 

 loads are dipped out with wooden bowls, and 



