Habitat.—Intestine. Mahommedan from Calcutta.
[It is evident that a re-examination of fresh material is required before the validity of all these species can be accepted.—J. W. W. S.]
Family. Troglotremidæ, Odhner, 1914.
Genus. Paragonimus, Braun, 1899.
Body egg-shaped or somewhat elongated, generally more broadly rounded in front than behind. Covered all over with spear-shaped spines arranged in groups. Gut cæca winding with dilatations or constrictions in parts. Ventral sucker in or in front of the middle of the body. Excretory bladder cylindrical, very long and broad, reaching in front to the bifurcation of the gut. The lateral excretory canals join the bladder only a little in front of the excretory pore. Genital pore median just behind the ventral sucker. Genital sinus duct-like. Cirrus sac absent. Male terminal organs very small. Ejaculatory duct present. Testes and ovary deeply lobed, the testes in or just behind the middle, the ovary somewhat laterally placed just behind the ventral sucker. Uterus forms a coil behind the ventral sucker. Eggs rather large, thin shelled, the ovarian cell still unsegmented on deposition. Receptaculum seminis, small.
Parasitic in the lungs of mammals, enclosed in cyst-like cavities, generally in pairs.
Type Species.—P. westermanii in the tiger.
Paragonimus ringeri, Cobb., 1880.
Syn.: Distoma ringeri, Cobb., 1880; Distoma pulmonale, Baelz, 1883; Distoma pulmonis, Suga, 1883.