PROCEEDINGS. 57 



A discussion ensued in which the following gentlemen took 

 part, viz. : — Rev. S. Wilkinson, Mr. J. T. Wilshire, the Hon. L. 

 F. De Salis and the Chairman. 



The thanks of the Society were accorded to the authors for their 

 valuable papers. 



Remains of Plesiosaurus. 



Mr. R. Etheridge, F.G.S., exhibited " Remains of Plesiosaurus 

 from Queensland." — The two bones presented to the notice of the 

 Society this evening, were forwarded to the Government Geologist, 

 Mr. C. S. Wilkinson, by Mr. H. S. W. Crummer, of the Surveyor 

 General's Office, and were found in the bed of a dry lake on Mr. 

 Barring-ton's Station, Pitchery Creek, Central Queensland. They 

 are portions of the vertebral column of an extinct reptile, 

 Plesiosaurus. This genus is characteristic of the Secondary rocks, 

 extending in range of time from the Lias to the Cretaceous series. 

 From the transverse elongation of the portions preserved, they 

 partake more of the facies of Plesiosauri of the Cretaceous than of 

 those found on the Lower Mesozoic Deposits. Prof. McCoy was 

 the first to record the occurrence of Enaliosaurian Reptiles from 

 Australian rocks ; and of the two species of Plesiosaurus described 

 by him from North Queensland, the present bones appear to 

 correspond better with the description of his Plesiosaurus 

 macrospondylus, than they do with any other. This portion of 

 the subject will however be entered on more fully hereafter. The 

 great point of interest attached to the present exhibit is the 

 relation these fossils bear to the Cretaceous group of Plesiosauri, 

 rather than to those of an earlier date, thus corroborating the age 

 which has usually been assigned to the secondary deposits of 

 Queensland. 



Electric Storage Battery. 



Mr. David Miller exhibited a new electric storage battery 

 consisting of five cells, by which he is enabled to store 10 per cent, 

 more electricity than by any previous arrangement. The battery 

 will give out two volts electro-motive power, and shows a 

 commercial efficiency of 72^- per cent, with an electro-motive 

 force of 1*8 volts per cell. The Excelsior motor used, takes 7^- 

 Ampere, and 30 volts at 1500 revolutions per minute, and is one- 

 third of one horse power. As a dynamo driven at 1500 revolutions 

 per minute it supplies six 15-candle lamps. It can drive a small 

 16-foot clingy. The electric lighting of Sydney could be done with 

 such batteries at a less cost than gas, and the light would of course 

 be superior. 



About thirty members were present. 



