Trans, and Proc. Roy. Soc. S. Austr., 1923. 



Vol. XLVII., Plate XX. 



.oioh.'t*^ ^^*i# .^^Ei«--«*«ai!.«c, 



V, 



jtr'i, t*-.^/ 



Fig. 1. 



Fi.u. 2. 





Fi.af. 3. 



Gillingham. Swaiin & Co. Ltd., Printers, Adelaide. 



