302 



larger than any described Turrit ella of our local rocks. This 

 was also placed on exhibit. Professor Osborn showed speci- 

 mens of sweet pea (Lathyrus odoratus) infected with "streak" 

 disease caused by Bacillus lathyri. The infection is produced 

 by the entry of the bacillus through the stomata, and its 

 spread is always likely to be rapid during periods of rain or 

 heavy dew. Also various methods of demonstrating by 

 curves the continuous or fluctuating variability shown by 

 organisms. Capt. S. A. White showed cast of a large fossil 

 shell, probably a volute, from Linley, near Morgan, 120 miles 

 north-east of Adelaide ; also a shell (Pecten bifrons) from an 

 excavation between Port Adelaide and the Grange in the raised 

 estuarine area ; also nest of the South Australian f antail 

 ( Rhipidura flab ellif era whiter J; also stone chippings found 

 round the Ooldea native well on the edge of the Nullarbor 

 Plain. Dr. J. C. Verco, for Professor Grant, showed a piece 

 of a plate glass window containing a minute round hole at the 

 bottom of a circular depression. Various opinions as to its 

 origin were expressed. 



Paper. — The paper laid on the table by Dr. J. C. Verco 

 at the last meeting was described by him and illustrated by 

 exhibits. 



Ordinary Meeting, September 12, 1918. 



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



chair. 



Mr. S. Dixon reported that the committee re Flinders 

 Chase, appointed on July 11, had issued a circular and inter- 

 viewed many prominent men, that a preliminary meeting had 

 been held in the Mayor's parlour, and that a deputation would 

 wait on the Premier next week. 



Exhibits. — Mr. Dixon showed a grass imported from 

 South Africa, named Ehrharta villosa, var. maxima, 

 which is superior to marram grass as a plant for 

 binding drift sand. Dr. Pulleine exhibited mill- 

 stones, scrapers, and axes from old native camps 

 near Broken Hill, and for comparison palaeolithic remains 

 from the caves in the Dordogne Valley, France ; also shell axe 

 from Mattei Island, New Britain, where there is absolutely 

 no stone, and neolithic axes from lake dwellings, Lake Zurich, 

 Switzerland ; also a hollow stone from the banks of the River 

 Murray, which Mr. Howchin declared to be an amygdule or 

 chalcedonic silica lined with crystals, an unusual example of 

 a hollow agate stone. Mr. W. Howchin showed rock speci- 

 mens and fossils from near Hackham, indicating a new locality 

 for the older tertiary beds (vide Miscellanea). Capt. S. A. 

 White showed portion of the lower end of a fulgurite from 



