393 



The animal breathes with its feet, which are kept in constant 

 motion, thus helping it to swim. 



Papeks. — "Secondary Rontgen Rays," by Prof. W. 

 H. Bragg, M.A., F.R.S. "Description of Australian Curcu- 

 lionidae, with Notes on Previously-described Species, Part vi. 

 Sub-family Leptopsides," by A. M. Lea, Government Ento- 

 mologist, Tasmania. 'New Australian Lepidoptera," No. 25, 

 by OsAVALD B. Lower, F.E.S., Lond. 



Ordinary Meeting, September 8, 1908. 



The President (J. C. Verco, M.D., F.R.C.S.) in the 

 chair. 



Exhibits. — Mr. W. N. Benson, B.Sc, exhibited Cam- 

 brian Glacial Till, from Cartwright Creek, twenty-seven miles 

 N.N.W. of Broken Hill. [The following particulars bearing 

 on this exhibit were supplied by Mr. Benson.] 



The following series occurs dipping to N.E. : — 1. Knotted 

 mica-schist. 2. Mica-schist with angular included fragments 

 of schist and quartzite and boulders of quartzite, quartz, and 

 granite. Estimated thickness, about 300 yards. 3. Band of lime- 

 stone, up to 20 ft. in width, and pinching out occasionally. 

 4. Band about 60 ft. thick, of large boulders, up to 4 ft. 

 in diameter, of granite, quartzite, and schist, in a schistose 

 or gritty matrix. 5. Knotted mica-schist with interbedded 

 quartzite bands. 



5. Jj-. 3. X 1. 



The correlation of the series 2, 3, and 4 (described by 

 Mr. J. B. Jaquet in 1893 as schistose conglomerate), with 

 lower Cambrian glacial beds of South Australia, is based on 

 — (a) Their lithological character ; (b) nature and mode of 

 occurrence of the interbedded limestone ; (c) thickness of the 

 series. Data are not yet sufficient for correlation on strati- 

 graphical grounds. What little is known is confirmatory. 

 The importance of their determination as glacial beds is : — 

 (1.) It determines the age of the Barrier Range crystalline 

 schists, and fixes an horizon in them which may be correlated 

 with a portion of the Mount Lofty Lower Cambrian series. 



