Boston, S. E. Cassino, 1882.

London: W. Bowyer, 1882

n.p., 1910?

Boston, 1907.

Baltimore, MD: Johns Hopkins University, 1891.

Baltimore: The Johns Hopkins Press, 1900.

Baltimore, Johns Hopkins Press, 1893.

scientific journal

1891 book by William Keith Brooks (1st ed.)

1884 publication by William Keith Brooks

Washington: National Academy of Sciences: 1891

Baltimore, MD: Johns Hopkins University, 1883.

New York ;The Macmillan Company, 1899.

New York: Macmillan, 1899.

New YorkMacmillan1899

Baltimore, J. Murphy, 1883.

Philadelphia: Journal of Experimental Zoology, 1910.