1895.] FOEAMIXIFERA FROSI THE ARABIAN SEA. 17 • 



of a yellow-brown colour, composed of fine material but with a few 

 included coarser grains of a dark colour. Edge of test rounded. 

 Diameter J^ 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 Haplopliracj- 

 mium glohigerimforme does to Globif/erina. 



H. truncatulini forme is represented in the Arabian-Sea soundings 

 by only one example, from Sample Xo. 6. 



PtACOPSiLr>'A, d'Orbigny. 



69. Placopsilota CBNOMAifA, d'Orbigny. 



Plampsilina cenomana, Brady, 1884, Chall. Eep. vol. ix. p. 315, 

 pi. xxxvi. figs. 1-3. 



Pound in Sample No. 6, very rare. 



Thurammixa, Brady. 



70. TnuRAMMiifA PAPiLLATA, Brady. 



Thurammina papiUata, Brady, 1884, Chall. Kep. \ol. ix. p. 321, 

 pi. xxxvi. figs. 7-18. 



Found in Sample Xo. 4, rare. 



HoEMOSiXA, Brady. 



71. HoEMOsiXA CARPEXTERi, Brady. 



Hormosiiia carpenteri, Brady, 1884, Chall. Rep. 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 Xo. 1, very rare: Xo. 4, common ; Xo. 6, 

 frequent, 



72. HoRSiosiXA OTiCTJLA, Brady. 



Hormosina ovicula, Brady, 1884, Chall. Rep. vol. ix. p. 327, 

 pi. xxxix. figs. 7-9. 



Found in Sample Xo. 1, very rare. 



73. HoRMosrif A globfliffra, Brady. 



Hormosina glohulifera, Brady, 1884, Chall. Rep. vol. ix. p. 326, 

 pi. xxxix. figs. 1-6. 



Found in Sample Xo. 6, very rare. 



AsiiroDisctrs, Reuss. 



74. AiiMODiscFS ijrcERTus (d'Orb.). 



Ammodiscm incertus, Brady, 1884, Chall. Rep. vol. ix. p. 330, 

 pi. xxx^dii. figs. 1-3. 



Found in Sample Xo. 1, rare ; Xo. 4, rare ; Xo. 6, very rare. 

 Peoc, Zool, Soc— 1895, Xo. II. 2 



