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Richard Rathbun.  Descriptions of new species of Parasitic Copepods, belonging to the genera Trebius, Perissopus, and Ternanthropus.

Proc. U.S. Nat. Mus., x, pp. 559-571, plates xxix-xxxv, 1887.

The following new species are described:

Trebius tenuifurcatus Rathbun, from sting ray, Vineyard Sound, U.S. Fish Commission.

Perissopus communis Rathbun, from four species of fish, ranging from Massachusetts to Florida.

Var. Stimpsoni Rathbun, from Great Egg Harbor, N. J., Dr.