400 
S. .1. JOHXSTOX. 
Diaschistorchis pandus, figs. 34-37. 
Fig. 34. — Horizontal longitudinal section, showing alimentary canal, 
cirrus sac and the related j)arts, uterus and yolk-glands. X 48. 
Fig. 35 . — Part of a transverse section passing through the genital 
aperture, showing the genital sinus, vagina and penis. X 82. 
Fig. 36. — Part of a transverse section passing through the vagina 
and the cirrus sac in the region of the ejaculatory duct, showing the 
very thick muscular wall of the sac. X 51. 
Fig. 37. — Horizontal longitudinal section, showing the separate testes 
and general anatomy, x 15. 
Pleorchis oligorchis, figs. 38-40. 
Fig. 38. — Horizontal longitudinal section, showing alimentary canal 
(partly filled up with host's blood), oesophagus, excretory vesicle and 
main relations of the reproductive organs, x 24. 
Fig. 39. — Part of transverse section passing through the ventral 
sucker near its jDosterior edge, and showing the genital sinus, vagina 
and male duct, with prostate lying free in the body parenchyma, x 51. 
Fig. 40. — Transverse section in the region of the ovary, showing 
ovary, ” shell - gland.” yolk duct, oviduct, receptaculum seminis and 
Laurer's canal. X 51. 
Steringotrema pulchrum, figs. 41 and 42. 
Fig. 41. — Longitudinal sagittal section a little to one side of the 
median plane, showing general anatomy. X 26. 
Fig. 42. — Transverse section in region of the ovary, showing Laurer's 
canal, oviduct, etc., and the relations of the intestinal and excretory 
tubes. X 53. 
