It is deplorable that the fact of an ordinary engineer, 

 chancing to see in a local paper a photograph of a so-called 

 prehistoric fish-trap, and associating it with the previously 

 unknown fate of one of Spain's boldest seamen, should in 

 any sense be offensive to a scientist. An engineer knows 

 that when he takes his sharpest pencil and runs it along 

 the edge of his best tee-square, the resulting line does not 

 lie evenly between its extremities. A huntsman knows 

 his dog only follows the scent by continually getting off it; 

 and I have a suspicion that a scientist only advance-; 

 knowledge by seeing things that his predecessors failed to 

 see, or viewed through a fog. 



ON AUSTRALIAN AVIAN ENTOZOA. 

 By T. Harvey Johnston, ma, b.sc, Assistant Government 



Microbiologist. 



(Prom the Government Bureau of Microbiology, Sydney, 



New South Wales). 



[Bead before the Royal Society of N. S. Wales, June 1, 1910.'] 



In this note there is an endeavour to bring together under 

 each host a list of endoparasites recorded as occurring in 

 birds in Australia as well as the references to their occur- 

 rence. These have been allotted under their respective 

 headings as Protozoa, Trematoda, Cestoda, Nematoda, and 

 Acanthocephala. Many of our birds have a geographical 

 range extending far beyond Australia, some of them being 

 common Old-world forms. Many parasites have been 

 described from some of these hosts, but unless the entozoa 

 were taken from birds from the Australian region, they 



