BY C. S. WILKINSON, L.S., F.G.S. 463 



the Pliocene channel was cut through, for the valley to have been 

 eroded several hundred feet deeper, and this before the drainage 

 water began to pierce the bed of limestone in which the caves 

 are. There can therefore be no doubt that these caves were 

 formed subsequently to the Pliocene period, and towards the close 

 of the Pleistocene period. 



They were discovered about 35 years ago, by the late Surveyor 

 General Davidson, when he was engaged upon the survey of the 

 Grove Creek ; and were visited a few days afterwards by the late 

 Mr. W. 0. Wentworth, and then by Governor Fitzroy. No doubt 

 in the future they will be resorted to by many tourists. 



NOTES AND EXHIBITS. 



Note on Sco?nber antarcticus, by William Macleay. F.L.S., &c. — 

 The Mackerel has been rather abundant lately in the Harbour, 

 and I am informed that, about a fortnight ago, the sea outside 

 the Heads was literally alive with them. They were apparently 

 young fish, and all seemed to be migrating in a northerly direction. 

 It is much to be desired that Fshermen and others who have the 

 opportunity of observing the movements of these and other useful 

 fishes, should make notes of the date of such appearances, and 

 communicate the same to me or some member of this Society, 

 as it is only by a combination of observations that a knowledge 

 of the habits of fishes can be ascertained with certainty. 



J. Brazier Esq., C.M.Z.S., exhibited the typical Voluta Angasi, 

 of Lamarck, obtained by Mr. W. T. Bednall, at Port Lincoln, 

 South Australia. The variety Voluta Angasi, (Sowerby) procured 

 by Eev. H. D. Atkinson at Circular Head and Barren Island, 

 Bass's Straits, also the variety V. Kingi, (Cox), obtained by Mr. 

 A. Simson at Barren Island. 



Mr. J. Hobson exhibited a number of entomological specimens 

 in spirits from the Solomon Islands. 



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