2. Revision of the Fauna of the Bokkeveld Beds.—By F. R. (With Plates IV-XI.) INTRODUCTION. SINCE the publication of the descriptions of the Trilobita, Brachiopoda, and Mollusca of the Bokkeveld Beds by Mr. P. Lake* and the author † in the Annals of the South African Museum about twenty years ago, a considerable amount of fresh material has been collected. Some of it was described by the author in a supplementary paper in the Annals in 1908, and in another communication to the Geological Magazine in 1906,§ while in the latter year Professor Schwarz || dealt with some specimens in the Albany Museum and described several new species. The present author reviewed the whole fauna and its relations in 1907,¶ and gave a list of references to papers concerning it up to that date. The great progress which has been made during recent years in our knowledge of the Devonian faunas of the South American continent has led to their closer comparison with the fossils of the Bokkeveld Beds, and Thomas,** Knod,†† Clarke,‡‡ and * Lake, 'The Trilobites of the Bokkeveld Beds," Ann. S. Afr. Mus., vol. iv, pt. 4, No. 9, 1904, pp. 201-220, pls. xxiv-xxviii. † Reed, "Brachiopoda from the Bokkeveld Beds," ibid., vol. iv, pt. 3, No. 7, 1903, pp. 165-200, pls. xx-xxiii; 'Mollusca from the Bokkeveld Beds," ibid., vol. iv, pt. 6, No. 11, 1904, pp. 239–272, pls. xxx-xxxii. Reed, "New Fossils from the Bokkeveld Beds," ibid., vol. iv, pt. 8, No. 14, pp. 381-406, pls. xlvii, xlviii. § Reed, "New Fossils from the Bokkeveld Beds," Geol. Mag., Dec. v, vol. iii, 1906, pp. 301-310, pls. xvi, xvii. || Schwarz, "South African Palaeozoic Fossils," Rec. Alb. Mus., vol. i, pt. 6, 1906, pp. 347-404, pls. vi-x; Reed, Geol. Mag., Dec. v, vol. iv, 1907, pp. 34-36. ¶ Reed, "Fauna of the Bokkeveld Beds," Geol. Mag., Dec. v, vol. iv, pp. 166–171, 222-232. ** Thomas, Zeitschr. deut. geol. Gesell., vol. lvii, 1905, pp. 233–290, pls. xi-xiv. †† Knod, Neues Jahrb. f. Miner. Geol., Beil. Bd. xxv, 1908, pp. 493-600, pls. xxi-xxxi. ‡‡ Clarke, "Fosseis devonianos do Parana," Mon. Serv. Geol. Miner. Brasil, vol. i, 1913, pp. 1-353, pls. i-xxvii. |