93 



CHAPTER VIT. 



STEUCTUEE OP PHYLLONELLA SOLEjE, VAN BENEDEN AND HESSE, 

 A PAEASITE OP THE COMMON SOLE. 



On the lower side of tlie sole are usually found specimens of a small parasitic flat 

 worm which lives on the surface of the skin. This creature was first named and 

 described by two Belgian zoologists, Van Beneden and Hesse, who called it Phyllonella 

 solece. It is of flattened shape, the dorsal surface being slightly more convex than 



Fig. C. 



Fig. D. 



Fig. C— Egg of Phyllonelta sotece, seeu tinder microscope in the fresh condition. Magnified lOO times. 

 Fig. B,— Phyllonella solecp, the ventral side uppeinnost, magnified 17 times; p.s., posterior sucker; 

 a.g., anterior glandular patches ; p., aperture of penis-sheath ; u., aperture of the uterus. 



