HISTORY OF THE ICHTHYOLOGY OF NEW BRENSWICK. 41 



CHAPTER IV. 



A few additions have been made since, and it will be 

 the writer's object to describe them in greater detail. 

 All have been deposited in the Natural History Museum, 

 St. John ; and whenever a doubt existed regarding the 

 determination some of the best authorities in North 

 America were consulted. 



Couesius plumbeus Agassiz. This is a species new to 

 our provincial fauna. Wm. M. McLean, Principal of the 

 St. John Grammar School, and the writer collected sev- 

 eral specimens from the upper St. John and Madaw^aska 

 rivers, as well as from the Squattook and Temiscouatri 

 lakes drained b}' the latter, in July, 1893. They are 

 small cyprinids ranging from three to five inches in 

 length, and varying greatly in detail according to locality, 

 the extremes of a series seeming to constitute well- 

 marked sub-species. Some of the constant features may 

 be here briefly alluded to. 



The scales are cycloid in form, and about seventy 

 may be counted in the lateral line, eleven between it and 

 the dorsal, and eight between the lateral line and the 

 ventrals. The dorsal is inserted slightly behind the last 

 ray of the ventral, and has eight rays, the anal fin having 

 an equal number. The large eye is contained one and 

 one-fifth times in the snout and one and one-third times 

 in the interorbital space ; the mouth is terminal, and the 

 maxillary scarcely reaches the orbit. 



On the other hand the coloration is extremel}^ varied. 

 In some specimens tbe plumbeous lateral band is scarcely 

 distinguishable ; in others nearly black : in the majority 

 the body is fusiform ; but in a few, heavy and chub-like 

 anteriorly. Some strange anomalies occur. One speci- 



