SPOROZOA OF THE FISHES OF THE ST. ANDREW'S REGION 35 



SESSIONAL PAPER No. 39b 



the final stage in their development or to defective preservation. It is worthy of 

 note that Fiebiger found also such sporozoites in his preparations ('08, Fig. s). 



6. Hcemogregarina sp ? 



In order to insure against the confusion of elements of the blood with stages 

 in the life-history of the parasites of the gall-bladder of Urophycis chuss, smears 

 of the blood were made. In these smears a hsemogregarine (Fig. 5) was found. 

 The infection was a rather abundant one, some hundred or so individuals being 

 found in a single smear and at times two in one field of the oil-immersion objective. 

 All the individuals found had the characteristic sausage shape of the merozoite 

 of haemogregarines. Usually one side of a red corpuscle was completely filled 

 by the parasite and olten the nucleus of the corpuscle was forced to one side (Fig. 5). 



Fig. 5. Hsemogregarina sp.? from the blood of Urophycis chuss. X 3000. 



The nucleus of the haemogregarine was usually about half as long as the individual 

 and filled its complete thickness; it was usually situated nearer one side. In the 

 nucleus could usually be distinguished a number of deeply staining granules. 

 Sometimes the merozoits weie bent upon themselves. In such cases, however, 

 the corpuscles were shorter than usual and the curling of the parasite was prob- 

 ably due to the drying of the smear. 



The host of the hsemogregarine, Urophycis chuss, occurs on the coast of 

 North America from the banks of Newfoundland to Cape Hatteras (Jordan and 

 Evermann 1898 ; III, p. 2555) . The writer is not aware of the description of any 

 haemogregarines from the fishes of these waters. / 



ON THE GEOGRAPHICAL DISTRIBUTION OF THE 

 PARASITES FOUND. 



Certain of the parasites found in the fishes of Passamaquoddy Bay are believed 

 by the writer to be of the same species as parasites found in the same fishes oc- 

 curring on the coast of Europe. 



Myxidium bergense has been found by Auerbach ('12) in Sebastes viviparus, 

 Anarrhichas lupus, Gadus callarias, Gadus aeglefinus, Gadus merlangus and 

 Pleuronectes platessa, caught at points on the coast of Norway extending from 

 Christian! a in the South to Vardo in the North, and by the writer in Gadus aegle- 

 finus from the eastern coast of Canada. 



Goussia gadi has been found by Fiebiger ('08) in Gadus morrhua and Gadus 

 virens from the coast of Iceland but not in Gadus aeglefinus from the same region 

 396— 3§ 



