27 



Podargus strigoides ... 

 Microeca fascinaus ... 

 Pardalotus melanocephalus 

 Myzomela sanguineolenta 

 Ptilotis fusca ... 

 Ptilotis chrysops 

 Myzantha garrula 

 Anellohia chrysoptern 

 Acanthogenys rufigularis 

 Entomyza cyanotis ... 

 Oriolus Sagittarius 

 Sphecotheres maxillaris 

 Corcorax melanorhampus 



Trypanosomes. Leucocytozoa. Both, 

 — 1 — 



Total individuals affected 4 20 12 



Total species affected ... 3 o o 



Microfihiriae have been found in 26 species of birds, of 

 which six are included in the present paper, one host being 

 new. 



I. — Plasmodium. 



(1) riasmodhim hiziurat (?) from f'lieno'psis atraUi 

 (Black Swan). — A large intra-corpuscular parasite of the black 

 swan, for the slide containing which I am indebted to Dr. 

 Bancroft, has the general appearance of a PlnsmorJium . The 

 parasites appear as rounded or irregularly oval bodies, often 

 at one end of the host cell, displacing the nucleus. Sometimes 

 the parasites are oval and lying alongside the host-nucleus, 

 occasionally they are bean-shaped, and in one or two instances 

 they tended to curl round the host-nucleus after the fashion of 

 Ilalferidnun. There were no marked halter-forms, however, 

 and their absence, coupled with the displacement of the host- 

 nucleus, suggest that the parasite is a Plasmodium , and not a 

 Hcdieriduim. No schizonts were detected to set the matter at 

 rest. The parasites showed an alveolar appearance of the 

 protoplasm, some (male forms) staining a paler blue than 

 others (female). Melanin appeared as fine scattered granules 

 (about 20 small grains in one male form), as fine granules 

 grouped at one side in another male form, as scattered 

 coarser orranules also in a male form, or as two large coarse 

 masses in the centre in a female form. Some of the infected 

 corpuscles were partly dehaemoglobinized. Even in a small 

 pale spherical form of 7 /x diameter, the nucleus was displaced. 

 One of the largest parasites, which assumed a slight halter 

 form, measured 14 x 5 /x, the host-cell containing it 

 15'8 X 8'2 /x. Descriptions of other examples of the parasites, 

 which were few in number, are as follow: — 



(1) Oval, deep blue, 9 x 5o /x, placed alongside the host- 

 nucleus, and displacing it, corpuscle partly^ 

 dehaemosrlobinized. 



