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Show 24 MR. F. CHAPMAN ON S O M E [Jan. 15, 119. BOLIVINA NOBILIS, Hantken. Bolivina nobilis, Brady, 1884, Chall. Eep. vol. ix. p. 424, pi. liii. figs. 14, 15. Found in Sample No. 1, very rare ; No. 5, rare. 120. BOLIVINA BEYBICHI, Eeuss. Bolivina beyrichi, Brady, Chall. Eep. vol. ix. p. 422, pi. liii. fig. 1. 121. BOLIVINA OBSOLETA, Eley. Bolivina obsoleta, Eley, 1859, Geol. in the Garden, p. 195, pi. ii. fig. 11, p. 202, pi. viii. fig. lie. Textilaria quadrilatera, Schwager, 1866, Novara-Exped., geol. Theil, vol. ii. p. 253, pi. vii. fig. 103. Textularia quadrilatera, Brady, 1884, Chall. Eep. vol. ix. p. 358, pi. xiii. figs. 8-12. Dr. Brady records this form (T. quadrilatera) from various stations in the Atlantic and Pacific Oceans, at depths between 350 and 1350 fathoms. That author also suggests that the form belongs rather to the genus Bolivina than to Textularia, on account of the compression of the test, together with the shape of the aperture. The species T. quadrilatera was originally described as a fossil from the Pliocene of Kar Nicobar; but was previously known from the Upper Chalk under the name of Bolivina obsoleta. The characters of both the recent and fossil forms are so nearly parallel as to satisfy the most critical student. Found in Sample No. 1, rare; No. 5, very rare. 122. BOLIVINA EOBUSTA, Brady. Bolivina robusta, Brady, 1884, Chall. Eep. vol. ix. p. 421, pi. liii. figs. 7-9. Found in Sample No. 5, very rare. 123. BOLIVINA AEENOSA, sp. nov. (Plate I. fig. 3 a, b.) Test rhomboidal, compressed ; consisting of about 13 chambers. Aboral end of test sharply angular. The earlier chambers are linear, but rapidly increase in breadth. Peripheral edge of the test somewhat sharp; and the outline ou the lateral aspect sinuous. Aperture an elongate slit. Test of a pale ochreous brown colour, finely arenaceous, but with a few coarser particles interspersed. Length •£§ inch (1-08 m m . ) : breadth -X- inch (•926 mm.). The above species is an exceptional one in the genus Bolivina species of that group usually possessing hyaline tests. The vertical position and slit-like form of the aperture, however separate it from the genus Textularia. Found in Sample No. 1, very rare. |