5 GEORGE V. SESSIONAL PAPER No. 39b A. 1915 



III. 



STUDIES ON THE SPOROZOA OF THE FISHES OF THE ST. ANDREW'S 



REGION. 



By J. W. Mavor, B.A., Ph.D., etc. 



Instructor in Zoology, University of Wisconsin, Madison, U.S.A. 



(Curator of the Biological Station of the Canadian Government on the 



Georgian Bay, Canada.) 



(Plate IV.) 



INTRODUCTION. 



The only papers published on the Myxosporidia of American fishes are two 

 by Gurley ('93 and '94) and a short one by Tyzzer ('00). During the twenty 

 years since Gurley 's papers our knowledge of the Sporozoa has greatly increased. 

 Only comparatively recently however has special attention been directed to the 

 Myxosporidia. The researches of Doflein, Mercier, Schroeder, Awerinzew, and 

 others have shown this gToup to be one of great interest, and to-day there is per- 

 haps no group of the protozoa which offers so many interesting features and about 

 the life-cycle of which there is so much doubt. 



The writer was of opinion that a study of the Myxosporidia living in the gall 

 bladders of fishes from the Eastern coast of America would lead to interesting 

 results, not only with regard to the distribution of these parasites, but also, it 

 was hoped, with regard to some of the disputed points of their life-history. The 

 present paper deals with the first of these subjects. Another paper to be published 

 later deals with the life-history of one of the parasites found, Ceratomyxa acadiensis 

 n. sp. 



While searching for myxosporidian parasites two other parasites were found, 

 a Coccidian and a Haemosporidian, which seem of sufficient interest to be included 

 in this list. 



MATERIAL AND METHODS. 



The material for the present investigation was collected in Passamaquoddy 

 Bay at or near the mouth of the St. Croix river while the author was at the Marine 

 Biological Station at St. Andrews, New Brunswick, Canada. The fish were brought 



(1) The writer wishes to acknowledge his indebtedness to the Board of Directors of the 

 Marine Biological Station at St. Andrews, New Brunswick, Canada for the privilege of working 

 at the station during the summer of 1912. 



