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a foot depth of stalagmitic material. J. Gr. O. Tepper, F.L.S., 

 showed two cases of Australian Phasmidce, illustrating his paper 

 read before the Society in October last. He remarked these were 

 some of the largest insects evolved and exclusively vegetable 

 f e iders. Mr. Tepper also laid on the table a fossil leaf from the 

 Ardrossan Tertiaries. Stirling Smeaton, B.A., mentioned that 

 he had found a Phasmid, or stick insect, very closely resembling 

 the leaf of a Casuarina, the tree on which the insect was captured. 

 W. H. Baker exhibited a crab (Portunus corrugatus), Pennant, 

 described as far back as 1777, and interesting as having a wide 

 distribution. The present specimen was dredged by Dr. Verco 

 in Investigators Straits last January. W. H. Selway showed 

 specimens of friable kaolinised felspathic rocks from Longwood 

 Gully, which is being used for the manufacture of porcelain. 

 W. HowcHiN, F.G.S., placed on exhibit before the meeting a 

 number of gypsum crystals discovered by Mr. James A. McGavisk 

 in the sides of a creek between Glenelg and Fulham. The gypsum 

 has formed in nests of crystals in the subfossil bed characteristic 

 of the raised sea area between Plympton sandhills and the coast. 

 Within geologically recent times these marshy flats were open ta 

 the sea, but in its retreat the marine forms became extinct over 

 the area, and the land has gradually sweetened. The gypsum is 

 most probably the result of the evaporation of sea water. Whilst 

 the sodium chloride has been carried off' by drainage, the lessi 

 soluble calcium sulphate (gypsum) has crystallised out in the 

 saturated estuarine silts, and in so doing has included numerous 

 shells in the crystals thus formed. These crystals have a brown 

 colour from the earthy matter included within them, and many 

 of those which formed in the shelly stratum, where there would 

 be a freer circulation of water, have suffered corrosion. Mr. 

 HowcHiN also exhibited a number of rock specimens and native 

 implements to illustrate his paper. 



Papers.— " Further Notes on the Geology of Kangaroo 

 Island," by W. Howchin, F.G.S.; " Further Notes on the 

 Australian Coleo2?tera" by Rev. Thos. Blackburn, B.A. 



Ordinary Meeting, May 5, 1903. 



Professor E. H. Rennie, M.A., D.Sc. (President), in the chair. 



Exhibits. — J. G. O. Tepper, F.L.S., showed a species of scale 

 insect ( Mytilaspis pomorum) that does much mischief to the apple 

 and is in some respects worse than the codlin moth. Mr. Tepper 

 also exhibited specimens of tourmaline and cairngorm from the 

 vicinity of Antechamber Bay, Kangaroo Island. W. Howchin, 

 F.G.S., mentioned that a company had been formed to work this 

 deposit, and explained the conditions under which these gem& 

 were found and their probable origin. W. G. Woolnough, B.Sc.> 



