329 



Alpha Particles of Radium," and the "Alpha Rays of Uran- 

 ium and Thorium," by Professor W. H. Bragg, M.A. 



"Descriptions of Australian Tineina," by Ed. Meyrick, 

 B.A., F.R.S. 



Ordinary Meeting, May 1, 1906. 



The President (J. C. Verco, M.D., F.R.C.S.) in the 

 chair. 



Ballot. — Harry Taylor, sharebroker, Adelaide, was elect- 

 ed a Pellow. 



Mr. HowcHiN then j^roposed : — "That the Royal Society 

 of South Australia respectfully call the attention of the Go- 

 vernment to the desirability of erecting a seismograph at the 

 Adelaide Observatory, by which scientific data of very great 

 interest and of practical importance may be obtained.' Car- 

 ried. It was agreed that the Secretary should forward a 

 copy of the above resolution to the Astronomical Society, at 

 the same time asking if any of the members would join a depu- 

 tation from the Royal Society and wait on the Premier, to 

 urge the necessity there exists for having some form of seis- 

 mographical instrument set up in Adelaide. The meeting fur- 

 ther empowered the Council of this Society to bring the mat- 

 ter before the Government. 



Exhibits. — Mr. W. B. Poole read a paper describing a 

 new Hydroid, found in the Patawalonga Creek, and Mr. E. 

 J. Bradley described the various phases through which the 

 animal passed while under observation, illustrating these on 

 the blackboard. 



The President (Dr. Verco) showed an alga from Beach- 

 port, which had been brought under his notice by Mr. Zietz. 

 Mr. McAlpine, to whom it had been shown, pronounced it an 

 alga new to science. The specimen on view at the larger end 

 was flattened, and about 7 in. in circumference, with no root 

 or base. The thallus, or stem, grows dichotomously, at cer- 

 tain points dividing into two equal arms, and these again di- 

 viding into two, but not always regularly. When dry the 

 colour is brown, but when moist olive green and glutinous to 

 the touch. Examined closely, the surface has a honeycomb- 

 like appearance. In section it is cellular, with a thin outer 

 cuticle. 



Mr. A. H. C. Zietz, a small, green pebble, dredged up 

 from 150 fathoms, supposed to be olivine. 



Papers. — "Notes on Marine MoUusca of South Austra- 

 lia," by J. C. Verco, M.D. "Remarks on the Occurrence of 

 Cambrian Glacial Till Beds in the Willouran Ranges, East 

 of Hergott," by W. Howchtn, F.G.S. "Mineralogical Notes 



