6 
LIST OF ILLUSTRATIONS. 
Plate XVI. 
Fig. i.- -Potato Tuber : Early Stage of Infestation. . .At end 
Fig. 2. — Potato Tuber : Advanced Stage of Infestation ,, 
Plate XVII. 
Map showing the Distribution of Australites ,, 
Plate XV III. 
Fig. i. -Section of hollow Australite, normal Button 
Core Shape, showing the beautifully glazed Interior ,, 
Fig. 2. — Section of hollow Australite, deformed, glazed 
Cavity divided by Septum ,, 
Fig. j. — Core of Button from Kangaroo Island, figured 
by Suess 
Fig. 4. — Normal W.A. Conical Shape, enlarged for 
comparison with Fig. 3 ,, 
Fig. 5.- -Smallest Australite, Lens-shaped, from Cool- 
gardie, weight 4.9 grains ,, 
Fig. 6. — Largest Australite, found by ’Sir John Forrest 
in Lat. 25.30 S., Long. 123 E. ; weight 1,790.5 
grains ,, 
Plate XIX. 
Fig. 1. -Section of button-shaped Australite, showing 
the Core to be almost homogeneous, with much 
disturbance from the downward flow of the excess 
of glass forming the ring and exhibiting well the 
chin “ d ” restrained by the surface film on the 
inner side from flowing on to and coalescing with 
the Core ,, 
Fig. 2. — Bleb or glass Bubble, showing Convex Surfaces 
both inside and outside the Bubble ,, 
Plate XX. 
Fig. 1. — Normal Lens shape with sharp circumferential 
Ring „ 
Fig. 2. — Lens showing line of Fracture of Ring on 
upper side of the Ring ,, 
Fig. 3. — Lens showing a portion of the Ring attached 
and other portions of the Ring, both showing Line 
of Fracture and complete as in Fig. 1 „ 
Figs. 4 and 5. — Button from S. Australia, showing 
the Conical Shape of the Core ,, 
Figs. 6, 7, 8, and 9. — Upper and low^er Surfaces of 
Buttons, after Mr. Dunn ,, 
