xvi Proceedings. [November 8th, iSgy. 



A few interesting Lepidoptera, Coleoptera, and other insects 

 were noticed, including Pieris callidice, which affected mountain 

 tops, in company with a few Erebice. Only seven species of 

 Land Mollusca were seen, of them the alpine form of Arianta 

 arbustorum was the most frequent. 



Mr. Thomas Rogers exhibited a small collection of Bryozoa, 

 from South Australia, and described the work among this group 

 of animals of Mr. Waters, a former resident in Manchester, and a 

 member of the Society. 



Mr. J. F. Allen exhibited specimens of Chromium and an 

 alloy of manganese and tin, requiring for their production the 

 intense heat of the electrolytic furnace ; also bars of various 

 sections of manganese bronze obtained by Dick's extrusion 

 process, a ram forcing the metal under pressure through openings 

 of any desired section. Bars and rails of any length can thus be 

 obtained superior to those of the rolling process. The sections 

 are fibrous and of much higher tensile strength. 



