STUDIES ON AVIAN HiEMOPEOTOZOA. 



641 



Studies on Avian Haemoprotozoa. 



I. On certain Parasites of the ChaflB,nch (Fring^illa ccelebs) 

 and the Redpoll (Linota rufescens).^ 



By 

 H. M. Woo«lroc'R, D.Sc.(L.oiid.), 



Assistant to the University Professor of Protozoology. 



With Plates 27—31. 



Contents. 



1. Introductory ..... 



2. Experimental Work and Technique 



3. The Parasites in Relation to their Hosts . 



4. Description of Trypanosoma fringillinarum, n.sp. 



(a) As found in the Birds 



(b) As found in Cultures 



The Significance of the Cultural Forms of Trypano 

 somes in Relation to the Question of an Alternate 

 Invertebrate Host 



(c) Notes on Nuclear Cytology and Division 



(d) Comparison with other Avian Species 



5. Note on Halteridium fringillte (Labbe) 



6. Note on Leucocytozoon fringillinarum, n.sp. 



1. Introductoey. 



My reason for taking up the study o£ Avian Haemoprotozoa 

 has been the desire to obtain, if possible, some definite 

 enlightenment on the important question of their life-cycle. 

 The far-reaching conclusions bearing upon this subject, to 



1 This research was carried out as Mackinnon Student of the Royal 

 Society during the year 1907-1908. The publication of the results has 

 been delayed for several months owing to a long stay at Rovigno in the 

 endeavour to supplement this work by the study of the actual parasites 

 described by Schaudinn in Athene noctua. 



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