47. 1883. HERTWIG, OSCAR, Die Symbiose oder das Genossenschaftsleben im Thierreich. 56. _Versamml. Deutscher Naturf. u. Aerzte_, Freiburg i/B. 48. 1883. RÜST, WILHELM, Ueber das Vorkommen von Radiolarien-Resten in kryptokrystallinischen Quarzen aus dem Jura und in Koprolithen aus dem Lias. 56. _Versamml. Deutscher Naturf. u. Aerzte_, Freiburg i/B. 49. 1884. CAR, LAZAR, Acanthometra hemicompressa (= Zygacantha semicompressa). _Zool. Anzeiger_, p. 94. 50. 1884. HAECKEL, ERNST, Ueber die Geometrie der Radiolarien (Promorphologie). _Sitzungsb. med.-nat. Gesellsch. Jena_, November 22, 1883. 251 A. _Supplementary List of Works Published in_ 1885:-- 51. 1885. D. RÜST, Beiträge zur Kenntniss der fossilen Radiolarien aus Gesteinen des Jura. 45 pp. 4to, and 20 plates. _Palæontographica_, Bd. xxxi. (oder iii. Folge, vii. Band). 52. 1885. KARL BRANDT, Die koloniebildenden Radiolarien (Sphærozoeen) des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. 276 pp. 4to, and 8 plates. 53. 1885. JOHN MURRAY, Narrative of the Cruise of H.M.S. Challenger, with a general account of the scientific results of the Expedition. Vol i. First part, pp. 219-227, pl. A. Second part, pp. 915-926, pl. N. fig. 2. 54. 1885. ERNST HAECKEL, System der Acantharien. _Sitzungsb. med.-nat. Gesellsch. Jena_, November 13. Since the printing of this Report began in 1884 and was far advanced in 1885, it was impossible to include the important works of Rüst and Brandt (L. N. 51, 52) in the descriptive portion, so that they are only referred to in the Introduction. 251 B. _Phaulographic Appendix_:-- A list of absolutely worthless literature, which contains either only long known facts or false statements, and may hence be entirely neglected with advantage. Compare § 252, and also L. N. 26, p. 9. 55. 1865. WALLICH, G. C., On the structure and affinities of Polycystina. _Trans. Micr. Soc. Lond._, vol. xiii. pp. 57-84. (Compare L. N. 26, p. 9.) {clxxix}56. 1879. WALLICH, G. C., Observations on the Thalassicollidæ. _Ann. and Mag. Nat. Hist._, ser. 4, vol. iii. p. 97. 57. 1866. STUART, ALEXANDER, Ueber Coscinosphæra ciliosa, eine neue Radiolarie (= Globigerina echinoides!!). _Zeitschr. f. wiss. Zool._, Bd. xvi. p. 328, Taf. xviii. (Compare L. N. 26, p. 9.) 58. 1870. STUART, ALEXANDER, Neapolitanische Studien. _Göttinger Nachr._, p. 99, and _Zeitschr. f. wiss. Zool._, Bd. xxii. p. 290 ("Blue Siliceous Crystals" in Collozoum inerme!). 59. 1871. MACDONALD, JOHN DENIS, Remarks on the Structure of Polycystina (Astromma Yelvertoni = Euchitonia Mülleri). _Ann. and Mag. Nat. Hist._, ser. 4, vol. viii. p. 226. 60. 1871. DOENITZ, W., Beobachtungen über Radiolarien. _Archiv f. Anat. u. Physiol._, 1871, p. 71, Taf. ii. (Compare L. N. 26, p. 7.)