PARAGONIMUS RINGERI 



573 



The intestinal caeca are wavy, and run to the posterior end of the 

 body, but are unbranched. The excretory vesicle runs from the 

 pharynx backwards to its aperture on the posterior margin of the 

 body. The genital pore is just behind the ventral sucker. There 

 is no cirrus pouch, and no receptaculum seminis. 



Type Speeies.—Paragonimus westermanii Kerbert, 1878. 



Classification.— There are five species, but P. rudis Diesing, 1850, 

 from a Brazilian otter, and P. compactus Cobbold, from an Indian 

 ichneumon, are not well known. According to Ward the other 

 three may be distinguished as follows, but Japanese workers do not 

 accept these characters as of specific value 



A. Chisel-shaped spines: — ■ 



L Arranged in circular rows in groups — Ringeri. 

 II. Arranged in circular rows singly — KellicoiH. 



B. Lancet-shaped spines:— 



Arranged in circular rows in groups- — Westermani. 



Fig. 222. — Paragonimus ringeri. 

 (After Looss, from Mense's ' Tropenkrankheiten.') 

 a, Schematic x8; 6, eggs x 300; c, natural size. 



Paragonimus ringeri Cobbold, 1880. 



Synonyms. — Distoma ringeri Cobbold, 1880; D. hepaticum Miura, 

 D. pulmonale Baelz, 1883; D. pulmonis Suga, 1883; D. cerehrale 

 1889; Yamagiwa, 1890; Mesogonimus westermani RailHet, 1890; 

 M. pulmonale Stossich, 1892. 



History —Paragonimus westermani was discovered by Kerbert 

 in 1878 in the lungs of two Bengal tigers, which died respectively 

 in the Zoological Gardens of Amsterdam and Hamburg. 



