THE FISHES OF GEORGIAN BAY 23 



SESSIONAL PAPER No. 39b 



The six species are separable as follows : — 



a. Rays of anal fin 7 or 8; 



b. Scales before dorsal in 12 to 15 oblique rows; 



c. A black stripe along the side of the body, extending through eye to end of 

 snout; 



d. Chin white cayuga 



dd. Chin black heterodon 



cc. A diffuse plumbeous lateral band, only evident posteriorly. Lateral 

 line with black specks above and below the pores blennius 



bb. Scale before dorsal in 18 to 20 oblique rows, a prominent black spot at the 



base of the caudal fin hudsonius 



aa. Rays of anal fin 9 to 11 ; 



e. Dorsal fin immediately over the ventrals. Anterior scales on 

 sides of body rather deep and narrow cornutus 



ee. Dorsal fin distinctly behind the ventrals. Scales rounded 

 normal atherinoides 



Notropis cayuga, var. muskoka, Meek. 

 (Plate II, fig. 9) 



Frequently taken in the shore swamps about Go Home Bay, and also appears 

 in collections from Sans Souci and Pte. au Baril. It seems to prefer the less open 

 swamps, but has not been found anywhere in abundance. The fish is easily 

 recognized in comparison with other minnows of the region by the small crescentic 

 markings along the sides of the body. 



Specimens submitted to Dr. Meek were referred to the species A^. muskoka, 

 a form described by him ('99) from specimens taken in Muskoka and Gull Lakes, 

 but with the suggestion that this form may be a variety of N. cayuga. In view 

 of the intermediate characters presented by Georgian Bay specimens, the latter 

 interpretation is here recognized. 



Length commonly 2 J inches. Body moderately elongated, only slightly com- 

 pressed. Depth 4.3 to 5.3 in the length of the body. General coloration oliva- 

 ceous, sometimes, in spring specimens, with a golden tinge. Scales above with prom- 

 inent dark edges. Vertebral line scarcely evident. A dark line passing along 

 the side of the body, through the opercle and snout, above the upper jaw. On the 

 trunk this line is separated from the dark-edged upper scales by a lighter band. 

 It is overlaid by a series of small crescentic marks, one at the base of every scale 

 of the lateral line. Head somewhat conical 3 . 4 to 4 in length of body. Eye 3 to 

 3 .7 in head. Mouth subterminal. Dorsal fin with 8 rays; anal with 7 or 8. Scales 

 5,34 to 37,3 or 4.15 (sometimes 16) rows of scales before dorsal fin. Lateral line 

 incomplete, lacking pores on some of the scales. Stomach and intestine 1 to 1.3 

 in length of body. 



