THE COPEPODA 105 



21. Sars, G. 0. An Account of the Crustacea of Norway. IV. Copepoda 



Calanoida, 1901-1903. V. Copepoda Harpacticoida, 1903 (in progress). 



22. Schmeil, 0. Deutschlands freilebende Siisswasser-Copepoden. Bibliotheca 



Zoologica, iv. Heft 11, 1892; v. Heft 15, 1894; vii. Heft 21, 1896- 

 1898. 



23. Stcenstrup, J. J. S., and Ltitken, C. F. Bidrag til Kundskab om det aabiie 



Havs Snyltekrebs . . . Kgl. Danske Vidensk. Selsk. Skrifter, (5) v. pp. 

 341-432, pis. i.-xv., 1861. 



24. Thiele, J. Beitriige zur Morphologic der Arguliden. Mitt. Mns. Naturkunde, 



Berlin, ii. (4), pp. 1-51, pis. vi.-ix., 1904. 



25. Wilson, G. B. North American Parasitic Copepods of the Family Argulidae, 



with a bibliography of the group and a systematic review of all known 

 species. Proc. U.S. Nat. Mus. xxv. pp. 635-742, pis. viii.-xxvii., 1902. 

 A New Species of Argulus. . . . Op. cit. xxvii. pp. 627-655, 1904. 



26. North American Parasitic Copepods belonging to the Family Caligidae. 



Pt. I. The Caliginae. Proc. U.S. Nat. Mus. xxviii. pp. 479-672, pis. 

 v.-xxix., 1905. Pt. II. The Trebinae and Euryphorinae. Op. cit. xxxi. 

 pp. 669-720, pis. xv.-xx., 1907. Pts. III. and IV. A Revision of the 

 Pandarinae and the Cecropinae. Op. cit. xxxiii. pp. 323-490, pis. 

 xvii.-xliii., 1907. 



