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Show 1895.] FOEAMINIFEBA F E O M THE AEABIAN SEA. 17 of a yellow-brown colour, composed of fine material but with a included coarser grains of a dark colour. Edge of test rounded. Diameter ^ inch (-6 mm.). This species supplies a link in the chain of isomorphs of the hyaline and arenaceous groups of Foraminifera, since it bears the same relation to a typical Truncatulina or a Rotalia as Haplophragmium globigeriniforme does to Globigerina. H. truncatuliniforme is represented in the Arabian-Sea soundings by only one example, from Sample No. 6. PLACOPSILINA, d'Orbigny. 69. PLACOPSILINA CENOMANA, d'Orbigny. Placopsilina cenomana, Brady, 1884, Chall. Eep. vol. ix. p. 315, pi. xxxvi. figs. 1-3. Found in Sample No. 6, very rare. THUEAMMINA, Brady. 70. T H U E A M M I N A PAPILLATA, Brady. Thuramminapapillata, Brady, 1884, Chall. Eep. vol. ix. p. 321, pi. xxxvi. figs. 7-18. Found in Sample No. 4, rare. HOEMOSINA, Brady. 71. H O E M O S I N A CAEPENTEEI, Brady. Hormosina carpenteri, Brady, 1884, Chall. Eep. vol. ix. p. 327, pi. xxxix. figs. 14-18. It is interesting to record this species from the Arabian Sea, since it has previously been almost entirely confined to soundings from the North Atlantic. Found in Sample No. 1, very rare : No. 4, common ; No. 6, frequent. 72. HOEMOSINA OVICULA, Brady. Hormosina ovicula, Brady, 1884, Chall. Eep. vol. ix. p. 327, pi. xxxix. figs. 7-9. Found in Sample No. 1, very rare. 73. HOEMOSINA GLOBULIFFEA, Brady. Hormosina globulifera, Brady, 1884, Chall. Eep. vol. ix. p. 326, pi. xxxix. figs. 1-6. Found in Sample No. 6, very rare. AMMODISCUS, Eeuss. 74. AMMODISCUS INCEETUS (d'Orb.). Ammodiscus incertus, Brady, 1884, Chall. Eep. vol. ix. p. 330, pi. xxxviii. figs. 1-3. Found in Sample No. 1, rare ; No. 4, rare ; No. 6, very rare. PEOC. ZOOL. SOC-1895, No. II. 2 |