SHAPES AND FEATURES OF AUSTRALITES 
49 
surface, bubble pits are elongated and drawn out at the narrow end 
into flow grooves (fig. lOA). The anterior surface has one prominent 
flow ridge (fig. lOB), and numerous flow lines simulating an isoclinal 
fold, some of which terminate sharply against the flow ridge on one 
side but pass through it on the opposite side. Locality: A quarter of 
a mile north-east of Fort Campbell Sports Ground. 
Plate X 
Pigs. IIA and IIB. A pear-shaped form comparable with Fenner’s (1934) 
“air bombs.’’ A few large bubble pits and flow lines occur on the 
posterior surface (top of fig. IIA) and a lesser number on the anterior 
surface (fig. IIB). At the narrow end are occasional flow grooves. 
Flaked areas on the anterior surface (fig. IIB) suggest some plucking 
away of glass during flight. Locality: Near Baker’s Oven Rock, 3^ 
miles east of Port Campbell. 
Plate XI 
Figs. 12A and 12B. A cusp-shaped form (fig. 12A) teardroplike when viewed 
from above (fig. 12B). On the anterior surface are flow ridges at 
right angles to the long axis (top of fig. 12A) which become crinkled 
towards the narrow end. Few bubble pits; deep bubble crater on 
posterior surface (dark area at top of fig. 12B). On the posterior 
surface are flow lines, small flow ridges (normally typical of anterior 
surfaces) and short, reticulating flow grooves; the flow lines trend 
towards the two drawn-out portions (fig 12A). The edges are turned 
slightly back towards the posterior surface, indicating an early stage 
in flange formation. Locality: Near Twelve Apostle rock stacks, 6 
miles east of Port Campbell. 
Plate XII 
Pig. 13. A club-shaped australite with a somewhat polished surface, a few flow 
lines and .small bubble pits; occasional wrinkled flow ridges on the 
head of the club. Length of shaft 24 mm.; thickness 7 to 8 mm.; 
width of the head 11 to 15 mm. at the widest end. The top portion, 
carrying remnants of flow ridges, is part of the original anterior 
surface. Locality: Near Kurnalpi, north-east Coolgardie Goldfield, 
Western Australia. 
Pig. 14. Another club-shaped australite; surface dull and carrying numerous 
small marks like percussion figures. Plow lines and flow grooves are 
conspicuou.s on the side.s of the head near the shaft, but there are very 
few bubble pits. Shaft 10 mm. long and from 4 to 5 mm. thick; the head 
is 7 mm. thick and 11 mm. wide. Locality: Kalgoorlie district. Western 
Australia. • , u 
The shape of these two club-like forms has been determined by 
abrasion, and the shape of the head of the Kurnalpi specimen has 
been partly determined by deep flow grooves. The position, shape and 
length of the shaft of the Kalgoorlie specimen has been determined 
by flow grooves and flow lines parallel to and adjoining the outer 
