DISEASES BUE TO INTERNAL PAEASITEiS. 221 



Description of XUustrations on Opposite page. 



Fig. I. Adult female, X 6, a, head; b, ovaries wound around tbe intes- 

 tines; c, c, uteri ; d, a large papilte, just in front of and cover- 

 ing the vulva ; e, anus. 



Fig. 2. Adult male, X 6. 



Fig. 3. Head — a, two barb-like papillae; d, mouth; c, cesophagus ; (/.in- 

 testine. 



Fig. 4. Eggs, highly magnified— a, eggs before they have left the ovaries ; 



b, eggs showing nuclei ; c, eggs after they have passed through 

 the oviduct; d, egg with one cell; e, with two ; /, with four; 

 g, with eight; h, with many; /, egg as it is laid. 



Fig. 5. Skin, showing nine of the eighteen longitudinal lines. 



Fig. 6. Portion of female — a, the intestine; b, b, the ends of the ovaries. 



Fig. 7. Caudal end of female — a, the anus ; b, the vulva ; c, vagina ; d, d, 



uteri filled with eggs ; e, oviduct ; f, f, ovary ; g, intestine. 

 Fig. 8. Spicula, enlarged. 

 Fig. 9. Bursa, expanded to show eostse : a, ventral ; b, ventro-lateral ; 



c, lateral ; d, dorso-lateral ; e, dorsal ; /, spicula. 

 Fig. 10. Group of adult males attfl females, natural size. 



Fig. 11. Caudal end of male — a, bursa; i, spicula; c, seminal reservoir; d, 

 intestine. 



