Note 494 — Chapter X · A PARENTHETIC NOTE ON GEODETICS
Reading edition
Cf. Bütschli, “Protozoa,” in Bronn’s Thierreich, II, p. 848, III, p. 1785, etc., 1883–87; Jennings, Amer. Nat. XXXV, p. 369, 1901; Pütter, Thigmotaxie bei Protisten, Arch. f. Anat. u. Phys. (Phys. Abth. Suppl.), pp. 243–302, 1900.