ABSTRACT OF PROCEEDINGS. iii. 



Abstract of Proceedings, April 26th, 1915. 



The Ordinary monthly meeting was held in the Geology 

 Lecture Theatre in the University at 8 p.m. 



Dr. T. H. Johnston, President, in the chair. 



Dr. Johnston thanked members for his election to the 

 office of president, and took the opportunity of recording 

 the members' appreciation of the work done by the 

 retiring Honoi'ary Secretary (Mr. F. Bennett) during his 

 years of office. 



The minutes of the special meeting of November 30th, 

 1914, were read and confirmed. 



Mr. J. R. Cullen, of Montville, and Miss Irene V. Butler- 

 Wood, B.D.S., were proposed as ordinary members, and 

 Miss Edna Peberdy as an associate member of the Society. 



Dr. F. Butler-Wood and Mr. J. Colvin were elected 

 members. 



The Library exchanges and donations for the month 

 were laid on the table. 



The following papers were read : 



(1.) Studies in Australian Lepidoptera, by A. Jefferis 

 Turner, M.D., F.E.S. 



Fifty-seven genera and 82 species are dealt with, of 

 which 10 genera and 49 species are new. They are mainly 

 from Queensland localities, a few being from othei Aus- 

 tralian States. 



(2.) The Nature and Origin of Manganiferous and 

 Ferruginous Incrustations and Deposits, by W. D. 

 Francis. 



The subject is treated under the headings of incrusta- 

 tions, bog-iron ore and bog-manganese, and the disintegra- 

 tion of rocks. Incrustations are divided into fluviatile, 

 subasrial, internal, marine and corrosive (chiefly iron rust). 

 The author is opposed to the theory that incrustations of 

 various types, accumulations of bog-iron ore and bog- 

 manganese, and the disintegration of rocks are brought 

 about by chemical action, and holds that these phenomena 

 are occasioned almost completely, if not wholly, by organic 



