102 CHECK LIST OF THE 



,-D. ; VI. to VIII., 16; A., 12 to 13. 



Colour, olivaceous, much speckled ; sides usually with several distinct 

 and rather broad cross bands ; fins barred and mottled. Length, five or 

 six inches. Very variable in size, colour, and length of fins. 



This fish ranges through the entire Great Lake Region and is abun- 

 dant in some of the Lake Superior trout streams, where it is said to be 

 very destructive to the eggs and young of Brook Trout. 



GENUS URANIDEA. (MILLER'S THUMBS.) 



This genus is very close to Cottus, from which it differs in the reduc- 

 tion of its ventrals to a concealed spine and three soft rays, a step further 

 in the degeneration characteristic of fresh-water types. The skin is 

 smooth or very nearly so, the preopercular spines small, and there is 

 usually no trace of teeth on the palatines. 



(109) Franklin's Sculpin. 



(Uranidea franklini.) 



Body rather short and stout ; snout not very obtuse ; maxillary reach- 

 ing about to pupil ; eye four in .head ; preopercular spine hook-like, very 

 acute ; paired fins rather short, the pectorals not reaching vent ; first dorsal 

 nearly as high as second ; dorsals contiguous ; anal inserted under fourth 

 ray of second dorsal ; caudal six in length ; lateral line incomplete ; vent 

 nearer base of caudal than tip of snout. 



D. VIII., 17; A., 12; V. I., 3. 



Length, three inches. 



Lake Superior. 



(108) Lake Miller's Thumb. 



(Uranidea formosa.) 



Body slender and graceful; head small, depressed above; eyes mod- 

 erate ; preopercular spine short, stout, acute, curved upwards ; a small 

 spine below it ; subopercular spine well developed. Dorsals well separated ; 

 anal beginning under third ray of soft dorsal ; pectorals not reaching to 

 posterior margin of spinous dorsal ; ventrals not nearly to vent. 



D. VIII., 16; A. II. Length, three and one-fourth inches. 



A single mutilated specimen has been recorded, this having been 

 found by Prof. S. F. Baird in the stomach of a Burbot (Lota maculosa) 

 taken from Lake Ontario. 



GENUS TRIGLOPSIS. 



Body and head slender ; skin naked ; lateral line chainlike ; teeth on 

 vomer, none on the palatines ; eye large, the interorbital area concave ; 



