61 
ant, (formiga de fogo) has a very painful bite, but it passes away immediately, 
without leaving any swelling or other effect. 
Mr. Eeed concluded his remarks by saying that he regretted he was 
unable to exhibit specimens of most of the insects he had mentioned, his 
entomological collection being still in the hands of his London agent. 
GEOLOGICAL SECTION- 
July 15th, 1868. — The fourth walk of the Section took place on this day, 
to Dundry. For the following account of it, we are indebted to Mr. W. W. 
Stoddart, F.G-.S., under whose guidance the party was placed. 
The party passed first through Bedminster Down, where the relative 
positions of the Trias and lowest beds of the Lias were pointed out. The 
ascent of the Hill was made by the western road. The first halt was for 
the purpose of finding out the Marlstone bed, and of ascertaining its height 
above the sea level ; this was calculated to be four hundred and eighty-one 
feet. The Knoll and Cross-road Quarries were next examined, but owing to 
their being unworked the collecting bags were not well filled. Numerous 
and very good examples of corals were obtained, some of the more common 
Mollusca, and the carapace of a Olyphea rostrata. 
Before leaving the Hill, the Members obtained an unusually advantageous 
view of a thunderstorm. It was well observed from the top of Dundry 
Hill, which has an altitude of more than seven hundred and sixty feet above the 
sea level. The storm was seen to come from the direction of Yatton and Ashton, 
thence (missing the Hotwells end of Bristol) it passed over Durdham Down, 
Cotham, and away towards Bath. The flashes were very beautiful and 
characteristic, exhibiting very distinctly the difference between those from 
the positive and negative ends of the cloud. In the one case they were of 
the usual zig-zag form, and in the other straight and threadlike. During 
the whole time heavy rain was seen to fall, at the various spots over which 
the storm passed, while the summit of the Hill where the party stood was 
dry and dusty. 
One of the Members collected a specimen of the coral bed containing a 
colony of Lithodomi in all its stages of growth; and snugly preserved in 
their stony homes. 
