SCIENCE PROGRESS 

 reported by Gerrard (.906), while dogs in Tonkin have reeently 

 *%Z£5££TS» «-*« these parasite, Balfour 



West Australian rats, tany in iyuy 



a h„ Miller describing a parasit.c organism said to be 

 appeared by Mil er ctescnD g P fl*«to»*i ^m«- 



Itr^a "inatn of his text and plates has led most workers 

 on he eroup to the conclusion that his parasite was really a 

 "ruienfform of L. muris. This will be dealt with m a sub- 



S X n st ye^^he^riter described a W~* from 

 the blooc 7 of whue mice (Mus musculi) obtained in London the 

 plraslte being the first recorded both from the mouse and ,n 

 this country. This parasite was named L musculi. 



To the best of my belief, the above list includes all the 



true mammalian Leucocytozoa known. o-eneral 



The Leucocytozoa of mammals are very similar, in general 



v,lwv7o the vermicular parasites belonging to the genus 



V^notfaZ found™ the red blood corpuscles of certain 



ntSf e.g. In the jerboa (H^ogreganna Wgri>,m ^ 



Inrlian eerbil, and in certain marsupials of Australia, un mis 



Indian germi, consider that the Leucocytozoa of 



" is shoo Id be placed within the genus tf^OT"-; 

 SureW the difference of habitat is sufficiently striking to separate 

 fhe tenera of strict mammalian H«mogregannes and Leuco- 

 cy of oa Further, the species of Hvmogreganna are very 

 numerous occurring especially in reptiles, amphibia, and fishes 

 We^wTreturn to fhis matter of nomenclature in a subsequent 

 section. 



III. General Description 

 The general shape of the Leucocytozoa may be described 

 as Somewhat vermiform (figs. ,, a, 3). There may be no very 

 marked difference between the ends of the body, which are 

 usually rounded, e.g. L. musculi, or the parasites may -be sligMy 

 attenuated and curled at one end, as in L. /'"'™'f <***£ 

 In some cases, e.g. L. eanis, L. muscuh, the parasites are rather 



