sentence: in 1865 , the british zoologist william henry flower named a 45-ft specimen that had been obtained from pekalongan , on the north coast of java , sibbaldius ( = balaenoptera ) schlegelii -- in 1946 the russian scientist a.g. tomilin synonymized s. schlegelii and b. borealis , creating the subspecies b. b. schlegelii and b. b. borealis .