﻿SNAIL HOST OF ORIENTAL LUNG FLUKE — ^ABBOTT 109 



A resume of the parasites carried by this species is given here. Iden- 

 tification of the intermediate snail hosts as '"''Melania ohliqtiegranosa 

 Smith" is unquestionably referable to Thiara granifera (Lamarck) . I 

 have examined specimens with the above identification from Formosa 

 Island and the illustrations published by Japanese parasitologists, 

 and I find that the implicated Formosan species is a minor race of the 

 widespread subspecies T. g. mauiensis Lea. 



Family HETEROPHYIDAE 



1. HAPLORCHIS TAICHUI (Nishieorl. 1924). 



Geographical disinhution. — Northern and central Formosa. 



Implicated by Faust, E. C. and M. Nishigori, 1926. 



Intermediate snail hosts. — Thiara granifera (Lamarck) ( + Melania 

 ohliqitegra7Wsus (Smith)) and Semisulcospira lihertina Gould. 



Second intermediate hosts. — Fishes: Cyprinus, Garribusia^ Gara". 

 siu^^ Zacco., Pseudorasbora.^ Phodeus., Ctenopharyngodon. 



Definitive hosts. — Birds ( ? ) , mammals, including man (experimental 

 infection). An intestinal parasite acquired by eating raw, infected 

 fish. 



"The miracidium which hatches from the egg penetrates the tissues 

 of the snail to which it is adapted, as in the case of the miracidial 

 larva of M. taihokiid, and metamorphoses into a sporocyst. Rediae are 

 produced parthenogenetically within these sporocysts, and after a pe- 

 riod of five to six weeks mature cercariae develop within the rediae. 

 These carcariae erupt from the snail tissues and are found freely swim- 

 ming about in the water." (Faust and Nishigori, 1926.) 



2. DIORCHITREMA FORMOSANUM Kataata. 1932. 



Geographical distribution. — Formosa. 



Implicated by Katsuta, 1932. 



Intermediate snail hosts. — Thiara granifera (Lamarck), and 

 Semisulcospira libertina Gould. 



Definitive hosts. — Mammals. An intestinal fluke acquired by eating 

 raw, infected fish. 



3. METAGONIMUS YOKOGAWAI Katsorada, 1912. 



Geographical distribution. — Japan, Korea, Formosa, Rumania, Si- 

 beria, Dutch East Indies, Palestine, Russia, and Spain. 



Intermediate snail hosts. — Thiara granifera (Lamarck) , Semiscul- 

 cospira libertina Gould, Hua amurensis Gerstfeld. The record of 

 '■'■Melania ebenina''' in China is probably referable to Hua toucheana 

 Heude. Unknown in the Philippine Islands and Eurasia. 



Second intermediate hosts. — Fishes : the salmonoid Plecoglossus al- 

 tivelis and the cyprinoid Richard^^omum.. 



