1SG PROCEEDINGS OF THE ROYAL SOCIETY OF QUEEXSLAND. 



He also gave an account of some other observations. The 

 heavy thunderstorm which ended the long drought in 1902 

 caused an enormous quantity of vegetable debris, dead leaves 

 and grass, to come down Enoggera Creek, Brisbane, this 

 forming a blanket about six inches in thickness covering the 

 surface. Fish, mainly mullet, died in hundreds but only a few 

 eels seem to have been affected. Although the water was 

 clear and the bottom was sandy and rocky, the fish, he believed, 

 had been suffocated. 



In mid\\'inter 1909 very cold weather was experienced in 

 the Mount Tambourine district, and large numbers of mullet 

 were killed in the Albert River. He believed this to have been 

 due to poisoning by the Moreton Bay chestnut, sine? large 

 numbers of these trees which Avere groAnng along the banks 

 were killed by the cold, their leaves and fnxit falling into the 

 water. 



He also mentioned that at Cania, 80 miles west of Many 

 Peaks, large numbers of fish — chiefly bony bream and mullet — 

 came to the surface of the water in Three Moon Creek (a tribu- 

 tary of the Upper Burnett) and died, as did also the eels which 

 fed on them. In this case the water was clear and running over 

 a sandy and rocky bottom Avith plenty of weed present. He 

 beheved ihe occurrence to be due to some form of poisoning. 



We arj not in a position to comment on any of thes : 

 three occurrences, which appear to be isolated. 



It Mill thus be seen that during 1917 and 1918 fish 

 epidemics occurred in many rivers widely remote from one 

 another and belonging to different drainage systems. It is 

 reported that an outbreak occurred in July 1917 at McKinley 

 on a tributary of the Cloncurry, itself a tributary of the Flinders, 

 flowing nto the Gulf of Car pen aria. This is the northern- 

 most locality known to us. The most seriously affected was 

 that system of rivers which flow inland towards Lake Eyre — 

 the Georgina, Eyre's Creek, the Diamantina, Cooper's Creek 

 or Bareoo with its tributaries, the Thomson and Wilson Creeks. 

 All exhibited the same phenomena at one time or another. 

 Four outbreaks have been recorded from the Thomson. The 

 mortality occurred during the winter of each year in the Bulloo, 

 another inland river. An epidemic was rejoorted in July 1918 



