V..1. XXXI . I'laU- XXL 



F,g. 1. 



Fiq. Ic 



Fig. 2. 



Fig. 2a. 



Fig. 3. 



Fig. 4. 



Fig. 4a. 



Hussev A; Giiliii;;liain, Printers, Adelaide. 



Figs. 1 and 2. — Twinned Ciypsuni Crystals from Pata^\•alon;^a Creek ; tMO-lhirds 

 natural size. 

 . 3 and 4. — Barytes .Sand Crystals from Hallett Cove ; natund size. 



