Minutes of Proceedings XCi 
water. This solution was not only cheaper than spirits of wine, but 
much better, as the plants immersed in the solution did not turn black, 
as proved by the exhibits. 
ORDINARY MONTHLY MEETING. 
Wednesday, November 27, 1894. 
Dr. GILL, F.R.S, F.R.A.S., Vice-President, in the Chair. 
The undermentioned presents were announced, and the thanks of the 
Society voted to the donors : 
Journal and Proceedings of the Hamilton Association, No. 10. 
Il Nuovo Risorgimento, Vol. [V., Fasc. 11. 
Proceedings of the Royal Physical Society, Edinburgh, 1893-94. 
Report of Fifth Meeting of Australasian Association, 1893. 
Feuille des Jeunes Naturalistes, No. 289. 
Smithsonian Report, U.S. National Museum, 1892. 
Contributions to South African Asclepiadology, by R. Schlechter. 
Mr. G. ALSTON exhibited a nodule of flint, partly broken, which he 
had found in Bushmansland. Flint nodules did not occur in that part 
of the country, and had probably been brought there, he surmised, by 
Bushmen; and from the said material the arrow-heads used by them 
were probably extracted. The arrow-heads made of that material were 
very rare, but he remembered having seen some in the hands of Mr. 
Piers, at that time curator of the museum. 
Mr. PERINGUEY stated that he had never seen these flint arrow- 
heads. 
Mr. ALSTON also exhibited some cases of a moth, a Psychid, which 
was supposed to cause the death of sheep if eaten by them. 
A discussion ensued, in which Messrs. Raffray, Péringuey and others 
joined, Mr. Péringuey stating that he was quite certain that the cater- 
pillar, even with his peculiar covering, could not be poisonous. He 
spoke at length on the Psychide and their cases, which varied extremely 
in shape, form and material, and were one of the best instances of 
mimicry for protection that could be illustrated, and promised to bring 
to one of the meetings a collection of these peculiar cases. 
Mr. FINLAY again wanted an expression of opinion on the possibility 
of a spider causing death, as reported from Piquetberg in the day’s 
paper. 
The general opinion was that there was no proof of the death having 
been caused by the act of a spider. 
