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 myico- 

 sporidiosis. 



The foUowings are the common species found in diflferent localities: 



Leptotheca parva Th^l. Marseille, Bergen 



Ceratomyxa sphaerulosa Th61. Monaco, Roscoff, Bergen 



C. appendiculata Th61. RoscofiE, Marseille, Rovigno 



C. drepanopsetlae Awerinzew Murman coast, Bergen, Woods Hole 



Chloromyxum leydigi Ming. Roscoff, Monaco, Napoli, Rovigno, Beaufort 



C. quadratum Th61. Roscoff, Marseille, Napoli, Beira 



Sphaerospora elegans Th61. Bretagne, Karlsruhe, Lago di Garda 



5. diver gens Th61. Napoli, Roscoff, Smalfjorden 



Myxidium lieberkiihni Biitsch. Lago Maggiore, France, Germany, Lake 



Mendota, Georgian Bay 



M. incurvatum Th61. Napoli, Monaco, Roscoff, Bergen, Beaufort 



M. bergense Auerbach. Bergen, St. Andrews 



M. oviforme Parisi Napoli, Norwegian coast 



Sphaeromyxa balbianii Th61. Roscoff, Napoli, Beaufort 



Myxosoma dujardini Th61. 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 cy print Fujita 

 Chloromyxum koi Fujita 

 Sphaerospora angulata Fujita 

 Lentospora acuta (Fujita) Kudo 



