CLASSIFICATION 25 



from that of the Ross Sea. That barrier was probably analogous to the Scotia arc, a land 

 connection which at some geological time extended between the Antarctic continent 

 and the continental masses to the north. The report by Messrs Chapman and Parr on 

 material obtained by Sir Douglas Mawson's expedition may do something to establish 

 the position of the dividing line. But it is quite possible that this report may only 

 establish the Ross Sea fauna still farther westward than 158^ E, as my friend, Mr W. J. 

 Parr, wrote to me quite recently that " Several of the Mawson stations are close to Gauss 

 station 56 (66° 2' S, 89° 38' E) but I do not recognize any of Wiesner's new species". 

 Mr Parr had previously informed me that Pseiidobulimina chapmani (No. 282) was found 

 in the Mawson material, also that Proteonina tubulata (Rhumbler) (No. 86), Amino- 

 tnarginulinaensis, Wiesner (No. 176), and Textularia termissima, Earland (No. 229), were 

 species which they had described as new, but had lost priority for, owing to delay in 

 publication. But the first three of these four species are known to have a circumpolar 

 distribution and are therefore of no value as evidence of identity in faunas. 



CLASSIFICATION USED IN THESE REPORTS 



The classification used in the three reports on Discovery Foraminifera is that of 

 H. B. Brady, with such modifications as seem necessary to adapt it to our greater 

 knowledge, and the vast increase in the known genera. In spite of its drawbacks, I regard 

 it as more intelligible and far less complicated than either of the new systems produced 

 in recent years in America. 



Since Brady's system was published the Rules of Nomenclature have been established, 

 and under them many of his generic names, after being in use for nearly a century, must 

 give way to earlier names. In the Falklands report Nonionina, d'Orbigny, 1826, and 

 Polystomella, Lamarck, 1822, were abandoned for Nonion and Elphidium, both Mont- 

 fort, 1808. In the present report Pyrgo, Defrance, 1824, replaces Biloculino, d'Orbigny, 

 1826, while Cibicides and Eponides, Montfort, 1808, are used instead of the long familiar 

 Truncatulma and Pidvinulina. But I am retaining Miliolina, Crlstellaria and Poly- 

 niorphino as comprehensive genera of well established significance. 



I have altered the gender of the specific names in some of my genera. This results 

 from correspondence with Dr W. A. Macfadyen before he left England. Nonion, for 

 example, which I had always regarded as neuter, being a word of unknown origin, 

 becomes masculine in accordance with its genotype N. incrassatns. Dr Macfadyen has 

 since published some notes on the subject which may help to establish unanimity among 

 workers.^ 



ACKNOWLEDGMENTS 



I have to acknowledge with thanks assistance received from many workers. Prior to 

 1933 my former colleague Mr E. Heron-Allen, F.R.S., had picked over a good deal of 



1 On the Correct Writing in Form and Gender of the Names of the Foraminifera. W. A. Macfadyen 

 and E. J. Andre Kenny. Joiirn. Roy. Micros. Soc, London, ser. iii, vol. liv, part 3, September 1934, 

 pp. 177-81. 



vx 4 



