TRANSACTIONS AND PROCEEDINGS 



OF THE 



RDYAL SOCIETY of SOUTH AUSTRALIA 



(INCORPORATED). 



-it- 



VOL. 2LL"V. 



[With Twenty-two Plates, and Twenty-seven 

 Figures in the Text.] 



EDITED BY PROFESSOR WALTER HOWCHIN, F.G.S.. 

 Assisted by ARTHUR M. LEA, F.E.S. 



922 



Mu%$*pS 



PRICE, NINE SHILLINGS 



Published by the Society, Royal Society Rooms, North Terrace. 

 DECEMBER 21, 1921. 



Printed by Gillingham, Swann & Co. Ltd., 106 and 108, Currie 

 Street, Adelaide, South Australia. 



Parcels for transmission to the Royal Society of South Aus- 

 tralia from the United States of America can be forwarded 

 through the Smithsonian Institution, Washington, D.C. 



