ABSTRACT OF PROCEEDINGS. 
tan. 
Mr. 0. A. Jones exhibited a specimen of the ammonite Beaudan- 
ticeras flindersi found near Aramac and presented to the University 
by Mr. D. Wearne. The specimen is nearly complete and shows the 
Septal sutures particularly well. It comes from the Tamho Series of 
Cretaceous age. 
Mr. F. A. Perkins exhibited a map showing the distribution of 
the more important vectors of malaria in the Dutch East Indies and 
Burma. He dealt briefly with the habits of the larvae and adults of 
the following species : — Anopheles minimus, A. maculatus, A. sundaicus, 
A. punctulatus, A. hyrcanus and A. umbrosus. 
Dr. M. White exhibited a ground glass assembly for the vacuum 
distillation of foaming liquids. Incorporated in the column was a 
patent anti-foam splash head. The receiver was a special adaptation 
of the Kon modification of the Perkin triangle. 
On behalf of Dr. W. H. Bryan, Mr. E. V. Robinson exhibited several 
specimens of Staurolite from the Cloncurry district exhibiting very 
regularly developed cruciform twinning. Similarly twinned crystals 
from Virginia County, U.S.A., are popularly known as ‘‘Fairy Crosses.’ ’ 
Mr. E. Y. Robinson exhibited a diamond-shaped specimen of 
-Phlogopite — the diamond shape being determined by the phenomenon 
of secondary cleavage along gliding planes brought about by a permanent 
rearrangement of the internal molecular structure of the mineral due 
to stress. An optical mineralogical analysis reveals that it is Biaxial 
and negative in sign with a small axial angle 2Y = 5°. Its Refractive 
Index is < 1-57 and it is Non pleochroic. 
Mr. Y. A. Weddell exhibited a life history case showing the various 
stages of the banana fruit-eating caterpillar, Tiracola plagiata. This 
Noctuid was recorded as a serious pest in the autumn of 1919 in certain 
areas. In 1927 a large scale outbreak destroyed a tremendous amount 
of fruit in banana plantations from Kilcoy to Gympie. In March, 1945, 
after a period of 18 years, the insect was again present in outbreak 
proportions, fortunately in a limited area just north of Dayboro. 
Abstract of Proceedings, 28th May, 1945. 
The Ordinary Monthly Meeting of the Society was held in the 
Geology Department of the University on Monday, 28th May, at 8 p.m., 
-with the President (Prof. H. J. Wilkinson) in the chair. About fifty 
members and friends were present. The minutes of the previous meeting 
were read and confirmed. Mrs. K. Avery, Miss Y. Tarnogurski and 
Mr. N. Shaw were elected to Ordinary Membership. Miss M. Grice and 
'Mr. T. Whalley were nominated for Ordinary Membership. 
A symposium on “Detoxication Mechanisms” was held. In opening 
the symposium, Dr. White stressed the importance of using the term 
detoxication in an unrestricted sense. For example, Aspergillus niger 
converted sodium telluride to dimethyl telluride (cultures showing this 
reaction were exhibited), and this might be regarded as micro-organism 
detoxication. The conversion of benzoic acid to hippuric acid by 
bovines was an example of detoxication by higher forms of life. The 
