FOREST, LAKE, AND RIVER 



The males have a large black spot at the base of 

 the dorsal fin in front, which fin is dusky orange ; 

 the tail fin is orange-yellow, and those on the 

 breast are translucent. The females have pale 

 olive-colored fins, without black spot or edgings ; 

 of the two sexes, they are the largest, but never 

 grow more than two inches in length. 



There is still another killifish, known as the 

 sheepshead or pursy minnow, that is found from 

 Cape Cod southward, in brackish water, and some- 

 times entering streams. It is not abundant in the 

 north, but when found the males may be recognized 

 by their dark olive-color, and the lustrous steel-blue 

 extending from the breast fins to those of the back. 

 The females are lighter olive on the back, and 

 have fourteen alternately wide and narrow vertical 

 dark bars. The males grow to three inches in 

 length, and the females to two inches. 



The silversides, small minnows sometimes used 

 as baits, are all of moderate or small size, some of 

 them entering or inhabiting fresh waters. Those 

 of New England and Eastern Canada are two in 

 number, the most prominent of which is found 

 (without a common name other than that of 

 " silversides") along the northern coast in numer- 

 ous schools. It is of transparent green color, with 

 a silvery lateral band, with spots along the edges 

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