251] 



STUDIES ON MYXOSPORIDIA—KUDO 



13 



DISTRIBUTION OF MYXOSPORIDIA 



.A. GEOGRAPHICAL DISTRIBUTION 



As will be seen from List III, Myxosporidia are common parasites of 

 fish in various parts of the world. 



It is interesting to notice that the same species are found among fresh- 

 water or marine fish from waters in widely separated countries. It is 

 possible to think that Myxosporidia in marine fish may be carried into 

 remote waters by the migration of their hosts, while those infecting fresh- 

 water fish may be brought from one place to another by the transportation 

 of infected fish for breeding purpose, etc. It should be noted in this con- 

 nection that no intermediate host has yet been found in relation to myxo- 

 sporidiosis. 



The folio wings are the common species found in different localities: 



Leptotheca parva Thel. 

 Ceratotnyxa sphaenilosa Thel. 

 C. appendiculata Thel. 

 C. drepanopseliae Awermzew 

 Chloromyxum leydigi Ming. 

 C. quadratum Thel. 

 Sphaerospora elegans Th61. 

 S. diver gens Thel. 

 Myxidium lieberkuhni Biitsch. 



M. incurvatum Thel. 

 M. bergense Auerbach. 

 M. oviforme Paris! 

 Sphaeromyxa balbianii Thel. 

 Myxosoma dujardini Thel. 



Marseille, Bergen 



Monaco, Roscoff, Bergen 



Roscoff, Marseille, Rovigno 



Murman coast, Bergen, Woods Hole 



Roscoff, Monaco, Napoli, Rovigno, Beaufort 



Roscoff, Marseille, Napoli, Beira 



Bretagne, Karlsruhe, Lago di Garda 



Napoli, Roscoff, Smalfjorden 



Lago Maggiore, France, Germany, Lake 



Mendota, Georgian Bay 

 Napoli, Monaco, Roscoff, Bergen, Beaufort 

 Bergen, St. Andrews 

 Napoli, Norwegian coast 

 Roscoff, Napoli, Beaufort 

 France, Germany, Tokio(?) 



On the other hand, some species are limited to certain localities. Five 

 species classified in the genus Sinuolinea by Davis are reported only from 

 Beaufort, N. C, U. S. A. The two species of the genus Wardia have been 

 found solely in the state of Illinois, U. S. A. 



More detailed data are shown in the following list. 



LIST II 



ASIA 

 I Nippon 

 Myxosporidia of fresh water fish 

 1) Northern Part (Hokkaido) 



Sapporo : Mitraspora cyprini Fu jita 

 Chloromyxum koi Fujita 

 Sphaerospora angulata Fujita 

 Lenlospora acuta (Fujita) Kudo 



