slate, making a very effective contrast. The slates in which 

 the specimens occur belong to the Mitcham slates horizon. 

 Dr. Verco exhibited shells dredged in Investigator Straits, 

 from 10 to 18 fathoms, closely resembling Lippistcs separa- 

 tista, Dillwyn, but having polygonal whorls. The type speci- 

 mens, as shown to Dr. Verco by Mr. Smith, of the British Mu- 

 seum, have polygonal whorls. Mr. Gatlih has areaged live 

 L/ppistes blainvillcames, Petit, from 5 fathoms, on the Vic- 

 torian coast, from which Dr. Verco extracted the radula, 

 which was found to be identical with that of Trichotropis 

 horecdis, found in Behring Straits, and within the Arctic 

 Circle. The President also showed limpets (rafcJla acuJe- 

 ata and P. ustulata) from Beachport and Port MacDonnell ; 

 the latter shell is found also in Tasmania and Western Aus- 

 tralia. Dr. Verco exhibited the radula of Trichotropis, un- 

 der the microscope. Mr. Douglas Mawson, B.Sc, exhibited 

 a collection of radio-active minerals : carnotite, from Radium 

 Hill, Olary ; a bituminous mineral from Taylor's Shaft, 

 Moonta ; monozite, from Emmaville, New South Wales ; 

 Cairns, Queensland ; and Pilbarra, Western Australia ; radio- 

 active sulphide of copper from Treuer's Shaft, Moonta ; 

 uranite, from Carcoar ; pitchhiendp , from Tamworth, New 

 South Wales; and euxenite, from the Barrier Ranges. 



Papers. — ''A Note on Some Modifications m the Mor- 

 phological Structure of the Mammalian Vertebrae," by A. H. 

 C. Zietz, F.L.S.. Assistant Director of the South Australian 

 Museum. "Description of Australian Curculionidae, with 

 Notes on Previously Described Species," by Arthur M- Lea, 

 Government Entomologist, Tasmania. Mr. Zietz exhibited 

 some lumbar vertebrae of various mammalians, both fossil and 

 those now existing, to illustrate his paper. 



Ordinary Meeting, September 4, 1906. 



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

 chair. 



Ballot. — Miss Ellen Milne Bundey was elected a Fel- 

 low. 



Exhibits. — Mr. Edwin Ashby exhibited a number rf 

 bird skins, from Port Keats, Northern Territory, sent by Mr. 

 C. E. May. Amongst these the white-headed eagle (Haliasfii-7\ 

 girrenera}, found also in Queensland, where it has been not- 

 iced to kill snakes. The great-billed cockatoo (CaJypforhyn- 

 chus macrorhynchus), with others of the same sub-family, 

 for purposes of comparison. The Oriental cuckoo fCiiculus 

 interinedius), very numerous during the wet season ; .the spur- 

 footed cuckoo (Centropus phasianus), having a very large and 



