202 PROCEEDINGS OF SECTION C. 



EXPLANATION OF PLATES XVIL— XIX. 



PI. XVII. — (1) Mt. Maungatea, Cook group, from the wharf, Raratonga 



Island ; (2) upper 200 feet of Mt. ]\Iaungatea, showing precipice of 



breccia. 

 PI. XVIII. — (1). Black Rock, on west side of Raratonga Island ; the rock is 



nephelinite. (2). Mt. Tapioi, Raiatea Island, Society group ; the top 



of the mountain consists of phonolite lava. 

 Pl. XIX. — Phonolite rock on Mt. Tapioi, Raiatea Island ; the surface of the 



rock is channelled by the tropical rainfall. 



5.— REPORT ON RECENT WORK ON THE ALKALI ROCKS IN 



VICTORIA. 



By PROFESSOR E. W. SKEATS. 



Since the Brisbane meeting (1909) Mr. Summers and I have nearly 

 completed our investigation of the field relations and petrographic 

 characters of the interesting series of alkali and other rocks of the 

 Mount Macedon district. The results will presently be published 

 by the Geological Survey of Victoria. As the result of a grant of 

 £10 from the Association, Mr. Summers has been enabled to spend 

 one of the University vacations in the Western District of Victoria 

 supplementing previous observation on the alkali rocks of that 

 area, which he and I made jointly in 1908. He has obtained much 

 additional information, which in the form of a paper he is presenting 

 at the present meeting of the Association. Much yet remains to be 

 done, especially in the Omeo, Noyang and Mt. Senister districts in 

 Eastern Victoria before our knowledge of the alkaline rocks of 

 Victoria can be regarded as resting on the firm foundation of com- 

 bined observation in the field and research in the laboratory. 



GLACIAL PHENOMENA COMMITTEE. 



See Adelaide volume, 1907, p. xxix. 

 Reappointed Brisbane, 1909 : — 



The Committee to consist of : Professor T. W. E. David, B.A., 

 E.R.S. ; Professor P. Marshall, M.A., D.Sc. ; Mr. E. G. Hogg, M.A. ; 

 Mr. G. Sweet, F.G.S. ; Mr. A. Gibb Maitland, F.G.S. ; Mr. B. 

 Dunstan, F.G.S. ; Mr. R. M. Johnston, F.G.S. ; Mr. W. H. 

 Twelvetrees, F.G.S. ; Mr. W. Howchin, F.G.S. ; Mr. G. A. Waller ; 

 Mr. R. Speight, M.A., F.G.S. ; Mr. A. E. Kitson, F.G.S. (Pro- 

 fessor David, Secretary.) 



Reports have been submitted by Messrs. W. Howchin (South 

 Australia), A. Gibb Maitland (West Australia), and R. Speight 

 (New Zealand), as follows : — 



