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-34- The Black's Fork River is the only tributary where heavy concentrations of bonytail were found over two miles from its mouth. The Black's Fork River was also the only tributary where fingerling bonytail were taken. During shocking operations in the latter part of May, 1959, at the Highway 30 cros- sing, approximately 35 river miles from the mouth, specimens from two to five inches were very common. This would indicate that the bonytail is reproduc- ing successfully in the Black's Fork River. It is doubtful that fingerling would move that distance upstream from the Green River. Specimens of bonytail were also taken above the Paravincini Diversion, approximately 42 river miles from the mouth by use of the electric seine during late October, 1959. ~.F.r.w~- ~, ~.. .a.- c .- - " .. ~,.- .~, w-. ~_ r ~ _~-~- _.~ ~; _. t~ _ _ -: ,_ - -_, ~r. "•~' Vie- _ , 'z' *~- .~x '.~`' Paravincini Diversion, Black's Fork River Bonytails were not taken in the upper section of Fontenelle Creek, Big Sandy Creek, Sage Creek or Sheep Creek; however, they are so universally dis- tributed there is a possibility that they are in these areas, but were not taken. The largest bonytail taken in the gill net sets was 19 1/4 inches long and weighed 2.0 pounds. Bluehead Sucker - (Pantosteus delphinus) This sucker seems to be more concentrated in the upper section of the Green River. The majority of these fish were taken between Station No, 1, below LaBarge, and a point about five miles below the mouth of the Big Sandy River.