Pelomyxa villosa, Amoebae, 'Studien uber Amoeben,' Griiber, Z. W. Z. xli. 1884; Amoeba tentaculata, A. actinophora; 'Beitrage,' etc, Id. ibid, xxxvi. 1882, cf. A. N. H. (5), ix., and Wallich, 'Critical Notes,' A. N. H. (5), xvi; Tricho-sphaerium (=Pachymyxa), Amoeba obtecta, Id. ibid, xxxviii. 1883, pp. 46, 55, 330; cf. A. N. H. (5), xi; Longicauda s. Ouramoeba, Pelomyxa; Korotneff, A. Z. Expt. viii. 1879-80. Amoeba cellarum, Joseph, cf. Naples Zool. Jahresbericht, 1884, A. Protozoa, p. 131. Lithamoeba, E. Ray Lankester, Q. J. M. xix. 1879. Enda?noeba Blattae, Leidy, A. N. H. (5), v. 1880; Butschli, Z. W. Z. xxx. 1878, p. 273. Amphizonella, with terricolous Amoebae, Greeff, A. M. A. ii. 1866. Zonomyxa, Nusslin, Z. W. Z. xl. 1884. Nebelidae, Taranek, Naples Zool. Jahresbericht, 1882, A. Protozoa, p. 88; cf. Id. ibid. 1881, p. 100. Petalopus, Claparede and Lachmann, Etudes sur les Infusoires, etc. i, 1858, p. 442. Arcellina, du Plessis, SB. Phys. Med. Ges. zu Erlangen, 1876. Plectophrys, Entz, Naturhist. Hefte des Nation. Museum zu Buda Pesth, i. 1877. Pleurophrys (=Pseudodifflugia) Genuensis (marine), Gruber, Nova Acta, xlvi, 1884, p. 486.

1 For, the synonymy of the various genera, which is very difficult, and cannot be fully entered into in such a work as this, see the list of genera in Butschli, op. cit. pp. 176-8, 183-8; also Leidy, op. cit. under the different genera and in his list of authors, pp. 297-319, in which he gives not only the titles of their works, but the names and synonymy of the species described.

Amphistomatous genera. Diplophrys Archeri, Hertwig and Lesser, A. M. A. x. 1874, Suppl. p. 139; Schulze, A. M. A. xi. 1875, p. 127; - Cystophrys oculea, Archer, Q. J. M. x. 1870, p. 112; cf. Leidy, op. cit. supra, p. 256; D. stercorea, Cienkowski, A. M. A. xii. 1876, p. 44. Ditrema, Archer, Q. J. M. xvii. 1877, p. 336. Amphitrema Wrightianum, Archer, Q. J. M. x. 1870, p. 122; A. stenostoma, Nusslin, Z. W. Z. xl. 1884, P. 717

Protoplasm, its layers: Gruber, Biol. Centralblatt. vi. 1886-7; cf Z. W. Z. xli. p. 196 j villous patch, Gruber, Z. W. Z. xli. 1885, p 199. Formation of gas-bubbles, Engelmann, Arch. Neerl. des. Sc. exactes. et Nat. iv. 1869; Id. Z. A. i. 1878; Entz, ibid.; du Plessis, Bull. Soc. Vaudoise Sc. Nat. xv; Biitschli, A. M. A. xi. 1875, p. 463; von Kennel, Arb. Zool. Zoot. Inst. Wurzburg, vi. 1883, p. 271.

Nucleus, Gruber, 'Kerntheilung,' etc. Z. W. Z. xl. 1884, pp. 122-31; in A. proteus (=auinta), Id. Z. W. Z. xxxviii. 1883, p. 382; cf. Brandt, Biol. Centralblatt. iii. 1883-4, p. 389; Gruber, ibid. p. 542. Multinucleate Amoebae,=A.prima, etc. Gruber, Z. W. Z. xli. pp. 193-207; cf. Id. Biol. Centralblatt. iv. 1884-5, P.710; Difflugiaproieiformis, R. Hertwig, J. Z. xi. 1877, p. 346.

Fission of Amoeba polypodia, F. E. Schulze, A. M. A. xi. 1875, P- 592; °f Euglypha alveolata, Gruber, Z. W. Z. xxxv. 18811; cf. Leidy, op. cit. supra, p. 212; of monothalamous Rhizopods, Gruber, Z. W. Z. xxxvi. 1882. Budding in Arcella, Buck, Z. W. Z. xxx. 1878, p. 4; Butschli, A. M. A. xi. 1875; Cattaneo, Atti Soc. Ital. Sc. Nat. xxi. 1879. Conjugation: in Arcella, Biitschli, A. M. A. xi; in Difflugia globulosa, Jickeli, A. N. H. (5), xiv. 1884; fusion of marine Amoebae, Kiihne, Untersuch.uber Protoplasma, Leipzig, 1864, p. 41; Maggi (quoted by Butschli), Rendic. d. R. Istit. Lomb. ix. p. 436.

Encystation. Amoeba, Niisslin, Z. W. Z. xl. 1884, p. 721; Fisch, Z. W. Z. xlii. 1885, p. 115; Wallich, A. N. H. (3), xii. 1863, p. 336; Carter, ibid. (3), xiii. 1864, p. 20; Luders, Botan. Zeitung, xviii. i860. Plakopus, F. E. Schulze, A. M. A. xi. 1875, P. 35I• Cochliopodium bilimbosum, Auerbach, Z. W. Z. vii. 1855-6, p. 387. Pseudochlamys (=Arcella), Archer, Q. J. M. xvii. 1877, p. 108. Phonergates= Pamphagus, Buck, Z. W. Z. xxx. 1878, pp. 27, 31. Platoum stercoreum, Cienkowski, A. M. A. xii. 1876, p. 43. Euglypha, Hertwig and Lesser, A. M. A. x. 1874, Suppl. p. 127. Diplophrys Archeri, Cienkowski, op. cit. p. 45.

Colony formation. Pamphagus, = Arcella hyalina, Fresenius, Abhandl. Senck. Ges. ii. 1856-8, pp. 221-2; - Gromia socialis, Schulze, A. M. A. xi. 1875, p. 121; =Phonergates (?) Buck, Z. W. Z, xxx. 1878, p. 23. Platoum stercoreum, Cienkowski, A. M. A. xii. 1876, p 42. Plectophrys, Entz, supra. Diplophrys Archeri, see Hertwig and Lesser, Schulze, supra.

Parasitic Amoebae. A.parasitica, von Lendenfeld, Proc. Lin. Soc. New South Wales, x. 1886. A. coli, Leuckart, 'Parasites of Man,' transl. by Hoyle, Edinburgh, i. 1886, p. 186. Gigantic Amoeba in chronic enteritis of Egypt, Kartulis, Virchow's Archiv fur Pathol. Anat. und Physiol. 99. 1885; cf. also note 2, p. 903, ante. Phonergates vorax (=Pamphagus), Buck, Z. W. Z. xxx. 1878, p. 20 et seqq.

1In a paper published in the M. J. xiii, (1), as this sheet goes to press, Blochmann states as to Euglypha alveolata, (1) that the parent may towards the end of fission withdraw all protoplasm from the test of the new individual, leaving its nucleus dead; (2) that conjugation occurs, as a rule temporary, in one instance, however, two individuals giving origin to a third and unusually large individual, being themselves used up in the process.