THE FISHES OF GEORGIAN BAY 49 



SESSIONAL PAPER No. 39b 



species superficially, but distinguishable by the darker marks of the back, and by 

 the W. or M-shaped flecks of the sides. 



Length 2 inches or less. Body elongated, tapering backwards from the shoul- 

 der. Depth 5.4 to 6.1. Head 3*7 to 4-2. Snout blunt, the mouth at its lower 

 angle. Premaxillaries protractile. Eyes dorsal and protruding. General colora- 

 tion pale straw yellow. Back with 6, sometimes 7, cross bars of dark color. Scales 

 more or less flecked, especially on the sides where there is a longitudinal series of 

 W,M, or X-shaped marks. Head with a bar forwards from the eye and a spot be- 

 neath it. Spring males are dull sooty or inky black. Anterior dorsal fin with 8 to 

 10 spines, posterior dorsal with 12 (sometimes 10 or 11) soft rays. Anal with 1 

 spine and 7 to 10 soft rays. Scales 4, 43 to 48, 8 to 10. Lateral line almost 

 complete, flexed downwards slightly in front. 



Family cottidae. 

 (Sculpins) 



Represented by two genera, each with a single species. One of these is 

 characteristic of the eastern shore, while of the other only a single specimen has 

 been found, this from the sedimentary zone at the Giants's Tomb Island. 



The two genera are separable as follows: 



a. Ventral fins with 1 concealed spine &nd 3 soft rays Uranidea 



aa. Ventral fins with 1 concealed spine and 4 soft rays Cottus 



Uranidea franklini, Agassiz. 

 {Fig. 6) 



Found lurking under stones in shallow water, and easily recognized by its 

 wedge-shaped body and fan-like pectoral fins. It always seeks concealment, and 

 if dislodged from one shelter darts rapidly to another. 



Length 2 inches. Body very heavy forwards, tapering backwards to the slen- 

 der tail. Depth 4 • 7 to 5 • 1. Head broad, its length 2 • 8 to 3 and its width 3 to 4 • 1 

 in the length of the body. Eyes dorsal in position, very large and protruding. 

 Preopercle with an abruptly hooked spine which is directed backwards and up- 

 wards. General coloration yellowish or brownish, with dark mottlings and cross 

 blotching above and on sides. Anterior dorsal fin with 8 slender spines, posterior 

 dorsal with 17 soft rays. Anal fin very long, with 12 to 14 soft rays. Pectorals 

 very large and fan-like, with 15 rays. Ventrals situated forwards, very small, 

 with 1 weak spine and 3 soft rays. Body naked. Lateral line complete. 



Cottus ictalops, Rafinesque. 

 (Miller's Thumb) 



In habit similar to the foregoing species. Probably not rare, but no specimens 

 have been taken on the eastern shore. The species occurs throughout the Great 

 Lakes, and is said to be especially abundant in Lake Superior. 

 396—4 II 



