^{page 377 note *} Beiträge z. Naturgeschichte d. Turbellarien, 1851.

^{page 377 note †} Sachs, A Text-Book of Botany (English edition), p. 687, note.

^{page 378 note *} “Certain animals (Infusoria, Cœlenterata, Turbellaria) possess chlorophyll, but there is no evidence to show what part it plays in their economy.” Huxley, , Anat. of Invert. Animals, 1877, p. 43.Google Scholar

^{page 378 note †} “Sur la Chlorophylle Animale,” &c., Archives de Zool. Exp., 1880, and Proc. Roy. Soc. Lond., 1879.

^{page 378 note ‡} Ibid., Postscriptum.

^{page 379 note *} Vergleichend Physiologische Studien, Bd. I. Abth. 1, p. 167.

^{page 379 note †} “Anat. de la Bonellie,” Ann. d. Sci. Nat. Zool., 4 Sér. tom. x.

^{page 379 note ‡} Vergl. Physiol. Studien, Bd. I. Abtheil 2, p. 76.

^{page 379 note §} Die Radiolarien, p. 136.

^{page 379 note │} “Sur les Siphonophores,” &c., Inst. Nat. Génevois, tom. i. 1854.

^{page 380 note *} “Amylum in d. gelben Zellen d. Radiolarien,” Jena Zeitschr., 1870, p. 532.

^{page 380 note †} “Ueber Schwarmerbildung bei Radiolarien,” Archiv. Mikr. Anat., 1871.

^{page 380 note ‡} Zur Histologie d. Radiolarien, Leipzig, 1876.

^{page 380 note §} “Der Organismus d. Radiolarien,” Jena Denkschriften, 1879.

^{page 380 note │} “Untersuchungen an Radiolarien,” Monatsb. Akad. Wiss., Berlin, 1881, p. 388.

^{page 381 note *} Loc. cit.

^{page 381 note †} “Die Actinien,” Jena Zeitschr., 1879, p. 495, plate xix.

^{page 381 note ‡} “Ueber Sagartia troglodytes,” Sitzungsb. d. Wien. Akad., 1877, p. 385.

^{page 381 note §} On “Myriothela (Russian),” Soc. Nat. Hist. Moscow, 1881.

^{page 381 note ║} Notes of a Naturalist on the Challenger, p. 293.

^{page 381 note ¶} “On Haliphysema,” Quart. Jour. Micro. Sci., 1879, p.482.

^{page 382 note *} “Die Mundarme d. Rhizostomen,” Jena Zeitschr., 1881.

^{page 382 note †} Pfeffer, “Pflanzenphysiologie,” Bd. I. p. 196.

^{page 383 note *} The amount of gas taken for analysis varied between 2 and 5 c.c., and averaged about 3.5 c.c.

^{page 384 note *} Cf., Hæckel, , Jena Zeitschr., 1870, p. 532.Google Scholar

^{page 385 note *} Lankester, Brit. Ass., 1871, p. 140.

^{page 385 note †} Vergleich. Physiol. Studien, Bd. I. Abth. 2.

^{page 386 note *} Comptes rendus, 1881.

^{page 386 note †} Krukenberg, however, disputes the identity of Merejkowsky's pigment with that which he has investigated, as well as the analogy of the former to hæmoglobin. See his Vergleich. Physiol. d. Verdauung., Heidelb., 1882.

^{page 387 note *} Krukenberg, , Z. Kritik des Schriften ueb. sog. intracell. Verdauung b. Coel, Vergl. Physiol. Studien, ii., 1 Abth., 1882, p. 139.Google Scholar

^{page 387 note *} Animal Life (Internat. Sci. Series), Lond., 1881, p. 74.

^{page 389 note *} (a) “Ueber das Zusammenleben von Thieren und Algen,” Verhandl. d. Physiol. Gesellsch. zu Berlin, 2 Dec. 1881.

(b) Sitzungsb. d. Gesellsch. naturforsch. Freunde z. Berlin, 15 Nov. 1881.

(c) “Die Symbiose niederer Tiere mit Algen,” Der Naturforscher, 14 Jan. 1881.

(d) Biologisches Centralblatt, 4 Jan. 1882.

(e) “Ueber die Morphologische und physiologische Bedeutung des Chlorophylls bei Thieren,” Archiv. f. Anat. u. Physiol., Physiol. Abtheil., April 1882.

^{page 390 note *} On “the Chlorophyll-Corpuscles and Amyloid Deposits of Spongilla and Hydra,” Quart. Jour. Micro. Sci., April 1882.

^{page 390 note †} “On the Chlorophyll-Bodies and Amyloid Deposits of Hydra and Spongilla,” Quart. Jour, Micro. Sci., April 1882.

^{page 392 note *} I must also point out with reference to Dr. Brandt's latest republication (Archiv. f. Anat. u. Physiol., 1882, p. 125), that the identity of Hydra fusca and Hydra viridis was made known several years ago by Duplessis, and with respect to the plate, that his figures of green infusors and their chlorophyll grains have been anticipated by Bernard, Claude, Leçons sur les Phénomènes de la Vie, &c., Paris, 1878.Google Scholar

^{page 393 note *} “Ueb. d. Natur d. Chlorophyll Körperchen niederer Tiere,” Biol. Centralbl., 20 Jan. 1882.

^{page 394 note *} Bot. Zeitung, 1880.

^{page 394 note †} The Academy, No. 508 (1882), p. 67; and Jour. Roy. Micr. Sci., April 1882, p. 245.

^{page 394 note ‡} Nature, 16th February 1882.

^{page 394 note §} Comptes rendus, Dec. 1881, No. 26.

^{page 395 note *} Quart. Jour. Micro. Sci., April 1882.

^{page 395 note †} “Observations on the Physiology and Histology of Convoluta Schultzii,” Proc. Roy. Soc. Land., No. 194, 1879, p. 452.

^{page 395 note ‡} Ibid., p. 454.