52 
n 5 
spaces (over and above the usual small, elongated spaces which 
give pumice its characteristic features) are often large, 
hoped that observers will be on the look out for urther 
evidences that may be of interest bearing on this subject. 
SCORIACEOUS LAVA. 
sea has washed the bases of the volcanic vents in the neigh- 
bourhood of Millicent since these volcanoes were in eruption, 
but there is nothing to indicate that these scoriae were actually 
derived from this source. re are igneous rocks on the 
Victorian coast, a little beyond the South Australian border, 
and it is possible that the specimens may have come from that 
direction ; if so, it would be a further evidence of an occasional 
westerly drift along the coast. 
ASPHALTUM (BITUMEN). 
This substance has a very wide distribution along the 
southern coast of Australia, extending from Tasmania on the 
A typical specimen was included in the beach specimens 
ments have been found. The specimens that have bee? 
obtained over this very wide area p very uniform 
characteristics, which make it probable that they have had 
& common origin. Wade has said,® ^I am firmly 
BM M LM E. Y 
(9 See L. Keith Ward: “The Possibilities of the Discovery 
~ Petroleum on Kangaroo Island and the Western Coast of pns 
eninsula," Geol. Sur. S. Austr., Bull. No. 2, 1913, p. 13- _AlS 
aoa T Wide (Tbo. Sup il-bearing Areas of Sou 
Australia," Geol. Sur. S. Austr., Bull. No. 4, 1915, p. 33- 
© Loc. cit., p. 34. 
