[162]. Internat. Inst. Mar. Biol. 1903.
[163]. A Naturalist in Indian Seas.
[164]. Scourfield, J. Quekett Micr. Club, 1903–4, gives a useful list of British Fresh-water Entomostraca. For the identification of fresh-water Cladocera, Lilljeborg’s “Cladocera Sueciae,” Nov. Act. Reg. Soc. Upsalensis, 1901; for Copepoda, Schmeil’s “Süsswasser Copepoden,” in Bibliotheca Zoologica, iv., v., and viii., 1892, 1893, and 1895 are recommended.
[165]. Trans. Norfolk and Norwich Nat. Soc. vii.
[166]. Le Lac Leman, 3 vols., Lausanne, 1892.
[167]. Consult Apstein, “Das Süsswasserplankton,” Kiel and Leipzig, 1896; and Arch. f. Hydrobiologie u. Planktonkunde, numerous papers.
[168]. Mr. C. H. Martin points out to me that in the Scottish lochs, which from their geological nature are evidently not connected with subterranean waters, none of them nor similar forms occur; nor do they in the Tasmanian lakes which are on igneous diabase, so that Forel’s conclusion would seem to be of wide application.
[169]. See Chilton, Trans. Linn. Soc. (2) vi., 1894, p. 163, with review of literature.
[170]. S. F. Harmer, Trans. Norfolk and Norwich Nat. Soc. ii., 1899, p. 489.
[171]. Mem. Nat. Acad. Washington, iii., 1886, p. 1.