NOTES AND EXHIBITS. 307 



NOTES AND EXHIBITS. 



Mr. C. Darley exhibited some very large examples of the shells 

 of the mud oyster (Ostrcea edulis var. angasi) obtained during 

 dredging operations in Rozelle Bay, Sydney Harbour. They 

 occur in great numbers at a depth of 10-12 feet below low water- 

 mark beneath a layer of black mud 3-4 feet thick ; and are much 

 larger than specimens now to be found living in the harbour ; the 

 two valves of one pair weigh 3 lbs. 12ozs., and measure about 8x6 

 inches. Mr. Darley also exhibited portions of the shell of Voluta 

 magnified, recently picked up by him on one of the northern 

 beaches, and presenting numerous superficial borings and channel- 

 lings made by some undetermined organism. 



Mr. Maiden exhibited samples of the kino of Angophora inter- 

 media and A. lanceolata in illustration of his paper. 



Mr. Fletcher showed a number of Batrachians referred to in his 

 paper. 



Mr. Froggatt exhibited a collection of insects, including about 

 200 species of Coleoptera, from the Ballarat district, Victoria, 

 collected during the months of March, April, and May. 



Also specimens of a rare saw-fly, Perga afii7iis, Kir by, likewise 

 from Ballarat, and, for comparison with it, specimens of P. dorsalis, 

 Leach, the common Sydney species to which it is closely allied. 



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