144 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Charles Wilkes, U.S. N. Published in 1853 as volume 14, part 2, of 
the Report on the Expedition, followed by a folio Atlas of Plates in 
1855. This was the first scientific expedition sent out by the United 
States Government and forms an appropriate prelude to the subse- 
quent explorations of the Albatross. One hundred seventy-one species 
of copepods, including free-swimming, parasitic, semiparasitic, and 
commensal species, are reported on. Dana served as a member of this 
expedition and thus had an opportunity to study the copepods while 
they were alive, as well as after preservation. He is the only author 
so privileged, and this gives his observations upon the color of the 
living copepods special value. At least 50 of his species are here re- 
ported from almost identical localities after the lapse of a century. 
2. Brapy, Grorce Stewarpson. Report on the Copepoda collected 
by H. M. S. Challenger during the years 1873 to 1876. Published in 
1883 as volume 8, part 23, of the Report on the Expedition. This work 
treats 106 species and includes parasitic and commensal as well as 
free-swimming forms. It is probably the most widely known cope- 
pod list and the one to which reference is most frequently made. 
3. Scorr, ANDREW. The Copepoda of the Siboga Expedition in the 
Dutch East Indies during the years 1899 to 1900. Published in 1909 
as monograph 29a, part 1, of the Report on the Expedition. Includes 
accounts of 338 species of littoral, free-swimming, and semiparasitic 
copepods and contains a very full and valuable synonymy and distribu- 
tion. The accompanying plates also give many details of structure 
not found elsewhere. 
4a. Sars, Grora Osstan. Copépodes particuliérement bathypélagi- 
ques. Published as fascicle 69 of the Résultats des Campagnes Scien- 
tifiques accomplies sur son Yacht par Albert It Prince Souverain de 
Monaco. The Atlas of Plates appeared in October 1924, the text in 
December 1925. 
4b. Rosz, Maurtcn. Copépodes pélagiques particuliérement de sur- 
face. Published in 1929 as fascicle 78 of the same Résultats. 
The two preceding Monaco lists (4a and 4b) are supplemental, and, 
for purposes of discussion, have been considered as constituting a 
single list. The former contains 297 deep-water species and the latter 
132 surface and shallow-water species. Eighty-one species appear in 
both lists, thus reducing the total Monaco plankton to 348 species, 
all of which are free-swimming. 
5. Witson, Cuartes Brancu. The copepods of the plankton 
gathered during the last cruise of the Carnegie. [Published post- 
humously in Carnegie Institution of Washington Publication 536, 
1942. Dr. Wilson’s discussions of the Carnegie plankton refer to his 
at the time unpublished manuscript.—W. L. S.] In collecting this 
plankton, nets of bolting silk 1 meter in diameter at the mouth 
