THE AUSTRALIAN NATURALIST 211 
tions showed an elevation of not less than 9 feet above pre- 
sent spring tide levels. 
Mr. P. D. Murray gave a lantern lecture entitled “Notes 
on Papua,” which was much enjoyed and appreciated by the 
audience. 
May 3rd, 1921—Mr. Frogeatt presiding and 56 members 
present. 
Miss Drummond exhibited fulgurites and read a deserip- 
tive note thereon and Mr. W. S. Dun offered interesting re- 
marks descriptive of the occurrence of these structures in. the 
sand hills at Kensington and Cronulla. Mr. E. L. Hayes a 
stone axe found at Blackheath near Eyan’s Lookout. Shapea 
from a water-worn basalt pebble, which must have been brought 
from a long way off. Mr. Hayes also showed a beautifully 
marked piece of chert from below Grand Canon, Blackheath. 
Chert is stated by Professor David to be perhaps the most 
characteristic non-carbonaceous rock of the Permo-carboni- 
ferous series. It may produced from diatoms, radiolaria, or 
sponge spicules, also from voleanic ash or tuff—Nobby’s Head, 
at Neweastle, over 80ft. high, is formed of regularly stratified 
cherts. : 
Miss McAnene brought the larva of Danais menippe, which 
was commented upon by the Chairman. Miss Steinbeck 
polished limpet shells from New Caledonia and the nest of 
the Mistletoe Bird. Mr. White supplied some interesting de- 
tails of the longevity of Carrasiops compressus in captivity. 
Mr. A. R. McCulloch gave an extremely interesting lecture 
on Lord Howe Island, in which he deseribed the devastation 
wrought by the accidentally introduced plague of rats and its 
effects on the Palm-seed industry, and offered some useful sug- 
gestions as to their destruction. Incidentally the rats are menac- 
ing the existence of certain rare indigenous birds by eating 
their eggs. The lecturer expressed the opinion that the Wood- 
hen would soon be extinct. The geological aspect of the island 
was illustrated by a series of fine lantern views and the most 
prominent species of the flora and fauna depicted in a similar 
manner. y 
The lecturer closed a most instructive address by remark- 
ing that the island provided some of the finest scenery he had 
ever seen. A vote of thanks was unanimously tendered to Mr. 
McCulloch. 
